Im a GoPro owner and I must say Im very satisfied. You don't have to film in full 170 FOV mode with the GoPro.
It supports full 170º, medium 127º, narrow 90º FOV (all in 1080p).
I concidered buying a contour, but it's mounting system sucks compared to the Gopro's. After alot of research I found the gopro to be the best action cam.
One warning though, a descent setup will cost more than just the camera bundle. You will soon find you need/wan't additional mounts, sd-cards, backup/storage-solution for you computer 🙂