Go Pro has it's place. Ken Block uses them extensively for Gymkhana because they don't have a remote box, so they're easier to mount around the place.
It all depends on what you're planning on doing with it, where it'll be mounted, will it be permanently mounted, etc.
I'm your SA RaceRecall.com dealer, so Radcam mainly, and I have a couple you can try out if you'd like.
I have heard some good things about the Drift HD and we should be getting those soon too. Heard interesting things about the Contour too, but no experience with them so far.
PM me if you want to check out the Radcam.