Whats the Best helmet camera?

I ski a lot in the winter and noticed people using GoPro and Contour cameras. I personally own a GoPro Hero 2 (much cheaper and basically the same thing as the new hero3) and have had great results with it, the picture is great, it has never fallen off my helmet. Only con would be the battery life in the winter, it seems to last 4x longer in the summer when i use it biking. Also if your using a GoPro Hero 2 you want to set it to 960p for skiing and snowboarding. This is because this mode shoots at 4:3 aspect ratio and gives the best affect and allows you to see your board/skis and still see far off infront and in the distance. I have heard the Contour also has a great picture quality but I don't know much about them, they seem to have a little screen on the side (gopro has no screen), i wonder how this affects battery life.