something a lot of people do not factor in with video is editing. When you edit a video, you lower the quality. Its that example of a copy of a copy. If you could somehow have the p2 and the vision+ controlled from the same TX so that both moved in the exact same way and filmed the exact same thing, you will see a big difference after it is all said and done. The reason is because you will do the same post editing with both images and the gopro image will appear better. For the sake of easy numbers, if the highest the vision can go is 100 and the highest a gopro can go is 150, every time you edit you cut that number in half. Run it through two filters and the vision goes from 100 to 50 then to 25. The gopro goes from 150 to 75 to 38. Once more and you are at 13 for the vision and 19 for the gopro. Sure the numbers seem very close but when you are trying to use the footage professionally, the small difference can be a huge deal.
As it has already been stated, the P2 with H3-3D with Gopro Black is going to provide you superior VIDEO footage over the Vision+. The vision+ is $1300 and that is a turn key solution. Nothing extra is needed. The P2 H3-3D is $959 but you still need a $400 gopro, a $100 FPV TX, $60 FPV antennas, $65 for telemetry, $200 for the monitor, and the ability to piece it all together. So a P2 H3-3D ends up running you almost $500 more. Is the $500 worth the money, that is the big question. It depends on what you are doing. If I'm just going out in the back yard and flying around my neighborhood and posting videos to Facebook and youtube, the vision+ is the way to go. If I am trying to take STILL images, the vision+ cannot be beat. If I am trying to film something which I intend to get paid for, then the extra $500 is an investment that must be made.
I am not for or against the vision+. The reality is that it is better at taking still photos and is going to be the most inexpensive fpv video aerial device available for what it offers. On the other hand, when it comes to video, the P2 is the best path. It is like this, you can buy a Lamborghini or you can buy a Camaro. Both will go really fast, one just goes faster. Do you really need the super high speed of the Lamborghini or is the speed of the Camaro good enough.
I would buy a vision+ to have fun with. I would buy a P2 to make money with....