It looks like the market is going to be down to just Go Pro in a short time. Contour went out of business last week. Ego and Liquid Image may be able to keep their niche, but the Go Pro is a solid camera. I only wish they had different options for the lens on it. Sometimes the fish eye is a little much.
My contour is 4 years old I believe? Still works well, as long as you take care of it.