I'm looking for a different camera for my Phantom 2 Vision+ V3.  Are there any other options available?  Would like to get something that doesn't have so much "curve".  I currently have both the Phantom 2 and Phantom 3.  Love the P3 camera.

By curve are you talking about the fish eye effect when you are filming downward. If so there are software programs to help remove that. I know it's a hassle but it comes from the type od lense being used.

Try googling Prodad, it does fish eye and shaky videos for free

100 bucks

Change the camera setting > 1080p > Narrow.