If you're more about the flying experience than video captured then P3A is for you. if that's not the case, spend a little more for the P3P for the 4K videos, even if you're not a "pro". Without any editing, I can pull the SD from my P3P, and play it for the family on the 60" 4K TV and it looks amazing (over 1080P). With prices coming down on these 4Ks I am suspecting more and more will have these in their living room. Why would you want to still shoot and play 1080P videos?
But on a serious note, it's all about your intention. For me, 4K is here, and even if I didn't fully take advantage of it at this moment, I am set for when I do/future.
Side note, Mircrocenter has them for 999.99. I just check prices this morning:
Micro Center - Computers and Electronics
Thank you for choosing Micro Center (Micro Center).
SKU#828129
Phantom 3 Professional Quadcopter with 4K Camera and 3-Axis Gimbal
$999.00