Interesting that you were looking for a Contour rather than a GoPro.
I have two GoPro Hero2's and a Contour Roam. I prefer the Contour for the GPS, built in Bluetooth, metal casing, spotter LED's and so on, but the GoPro is definitely the staple these days, with better available mounts, better editing software etc.
Whether GoPro is the best or not, it's the best due to the fact that is the most popular.
Def