So I ended up with all three monitors somehow, lol. 
Figured I'd offer some feedback based on some (brief) first hand experience.
RC801 7ch (aka Black Pearl) - paid $230; SMA
The build quality of the BP surpasses both other monitors. The buttons have a solid tactile click and there's never a question of whether I fully depressed one or not. Buttons are responsive to the clicks as well (this is important and you'll read why later). I like the matte black finishing on the case. The removable battery is a big plus for me. In terms of picture quality, I find it to be the best of the three. Saturation and contrast are good, brightness at 50% is usable even in broad daylight (which is contrary to reports I've read), especially with the large hood. Speaking of the hood, that's probably my most and least favorite part. It's a good size to be effective, but it's a pain to attach. Yet leaving it on makes storing and transporting it difficult. I will be looking into a soft, foldable hood soon. The LCD can be viewed from all angles (though it's best from on axis, obviously). User interface is nice and easy to navigate.
RX-LCD5802 - paid $150; SMA
Build quality of the 5802 leaves a little bit to be desired, IMO. I dislike that the tripod thread is just machined into the mount. The metal seems weak and like it could strip easily, though I haven't read any reports of it doing so. The finish is a semigloss, almost gunmetal gray I'd say, with a slight metallic finish (it sort of sparkles..). I don't love it, but I don't hate it. I like the idea of an integrated hood, but I find it to be too small to be very useful when the sun is bright. Though something is better than nothing, I guess. Despite reports and YouTube videos claiming the 5802 to be brighter than the BP, my roommates and I found the BP to be the brighter of the two (both were at 50%). I tried increasing the brightness on both monitors, but found them unusable as the entire picture just became washed out (looked faded). Colors were similar to the BP, although a tad more contrasty (I left all the settings on default). Still very usable. I find it annoying that a power supply was not included. I understand it's only $5 or so, but I'd rather pay $8 more for the monitor and have it come with a power supply. Viewing angle is poor, IMO. User interface is nice and easy to navigate.
RC732-DVR - paid...nothing; RP-SMA
I got this monitor on the notion that it would be the same as the highly acclaimed 5802, but with DVR built in. Sounds good, right? Not so much. So the housing that it comes in is 98% the same as the 5802. The finish is gloss black, which I hate. It looks cheap and collects finger prints like no other. Can't stand it. The buttons have a solid click, but they don't always respond. Hmm, that's annoying. Especially the center button, which is used to start and stop the DVR. Colors are over saturated and contrasty, just as others have reported. But honestly, I've found it completely usable (for my purposes thus far) for FPVing. I get a "god enough" idea of what I'm capturing. I'm generally not looking for fine detail, just the overall composition. And I've been able to do that fine so far. The DVR function seems to be hit or miss. I can't seem to record two videos on the same power cycle. That is, I start and stop one, then it freezes. I have to restart the monitor to record a new clip. On the plus side, it did come with a power supply. Viewing angles is poor like the 5802. User interface...let's just say it's obvious that it came from China. It just has that look and feel. If you've ever dealt with Chinese electronics and their UI, then you know what I'm talking about. Speaking of which, this monitor has the slowest startup time of the bunch. It has a greeting picture at startup for a couple seconds that I can't seem to get rid of.
Overall, I'm between the RC801 and LCD5802. I like the RC801 better, but I'm not sure if it's $80 better. I'm leaning towards yes, but I'm going to give the LCD5802 some more time.
From left to right: RC801, RC732, LCD5802
***all monitors are set to default settings (50% brightness, etc.)
Note the poor viewing angles of the RC732 and LCD5802 (and no, it's not because they have a hood installed).
Hope this helps some people out.
Figured I'd offer some feedback based on some (brief) first hand experience.RC801 7ch (aka Black Pearl) - paid $230; SMA
The build quality of the BP surpasses both other monitors. The buttons have a solid tactile click and there's never a question of whether I fully depressed one or not. Buttons are responsive to the clicks as well (this is important and you'll read why later). I like the matte black finishing on the case. The removable battery is a big plus for me. In terms of picture quality, I find it to be the best of the three. Saturation and contrast are good, brightness at 50% is usable even in broad daylight (which is contrary to reports I've read), especially with the large hood. Speaking of the hood, that's probably my most and least favorite part. It's a good size to be effective, but it's a pain to attach. Yet leaving it on makes storing and transporting it difficult. I will be looking into a soft, foldable hood soon. The LCD can be viewed from all angles (though it's best from on axis, obviously). User interface is nice and easy to navigate.
RX-LCD5802 - paid $150; SMA
Build quality of the 5802 leaves a little bit to be desired, IMO. I dislike that the tripod thread is just machined into the mount. The metal seems weak and like it could strip easily, though I haven't read any reports of it doing so. The finish is a semigloss, almost gunmetal gray I'd say, with a slight metallic finish (it sort of sparkles..). I don't love it, but I don't hate it. I like the idea of an integrated hood, but I find it to be too small to be very useful when the sun is bright. Though something is better than nothing, I guess. Despite reports and YouTube videos claiming the 5802 to be brighter than the BP, my roommates and I found the BP to be the brighter of the two (both were at 50%). I tried increasing the brightness on both monitors, but found them unusable as the entire picture just became washed out (looked faded). Colors were similar to the BP, although a tad more contrasty (I left all the settings on default). Still very usable. I find it annoying that a power supply was not included. I understand it's only $5 or so, but I'd rather pay $8 more for the monitor and have it come with a power supply. Viewing angle is poor, IMO. User interface is nice and easy to navigate.
RC732-DVR - paid...nothing
; RP-SMAI got this monitor on the notion that it would be the same as the highly acclaimed 5802, but with DVR built in. Sounds good, right? Not so much. So the housing that it comes in is 98% the same as the 5802. The finish is gloss black, which I hate. It looks cheap and collects finger prints like no other. Can't stand it. The buttons have a solid click, but they don't always respond. Hmm, that's annoying. Especially the center button, which is used to start and stop the DVR. Colors are over saturated and contrasty, just as others have reported. But honestly, I've found it completely usable (for my purposes thus far) for FPVing. I get a "god enough" idea of what I'm capturing. I'm generally not looking for fine detail, just the overall composition. And I've been able to do that fine so far. The DVR function seems to be hit or miss. I can't seem to record two videos on the same power cycle. That is, I start and stop one, then it freezes. I have to restart the monitor to record a new clip. On the plus side, it did come with a power supply. Viewing angles is poor like the 5802. User interface...let's just say it's obvious that it came from China. It just has that look and feel. If you've ever dealt with Chinese electronics and their UI, then you know what I'm talking about. Speaking of which, this monitor has the slowest startup time of the bunch. It has a greeting picture at startup for a couple seconds that I can't seem to get rid of.
Overall, I'm between the RC801 and LCD5802. I like the RC801 better, but I'm not sure if it's $80 better. I'm leaning towards yes, but I'm going to give the LCD5802 some more time.
From left to right: RC801, RC732, LCD5802
***all monitors are set to default settings (50% brightness, etc.)
Note the poor viewing angles of the RC732 and LCD5802 (and no, it's not because they have a hood installed).
Hope this helps some people out.
