I have a Hero 3 white edition and a Hero 3+ black edition. The 3+ is a lot better. It will do 12Mp stills vs 5mp of the white edition and higher frames per second when recording video, which is really good for slow motion and action shots. My issue now is the editing. I have a decent computer, but it can't handle the high frame rates and high HD settings. It will play them fine, but editing lags a lot, so I'll have to get a new computer soon. They will all give you some fisheye depending on the settings, but you can fix that in the GoPro editing software. Get the 3+ Black edition. It costs more, but you'll be glad you got it.
I use mine for aerial video. This was shot in 1080p, 30fps, medium field of view.