GoPro hero 3 black is better than the VIO POV HD. The Sony cam is the best one at night.
But it looks like you have a brick on your head

as does the Contour. The POV series may be bulkier and lacking slightly in quality (tbh when I had a pov there was nothing out there to best it) but you get a subtle lens, a hardcase battery/recording unit that can take a hell of a lot of abuse, and a camera which is obviously much less of an eyesore.
I fell off enduro bikes many times, inc on tarmac in snow

and nothing fazed it. In fact, it caused more damage to me than the road caused to it lol