Better than the internet tells you
There are a lot of reviews out there that poopoo the Contour vs. the GoPro. They are both great cameras, and with the sales currently on this one it's worth the money. The plethora of mounts, durability and ease of use make this your go to camera. The only mount you can't get for the Contour that you have for the GoPro is the chest harness, but that's ok with me. I would recommend getting the lens replacement/add-on kit and then getting a polarizer lens to keep the image from washing out (reduces glare). Also, read up on the forums out there for how to pick your setting. You don't need 1080 unless you are burning bluray discs or only watching on your computer (and you better have a burly computer) otherwise use the 720p 60 frames per second mode, allows you to have super smooth slow mo and capture at dvd quality (dvd's are at 720p). Attached is my camera with the 37mm lens adapter and a polarizer lens, is great on the water, cuts glare out and is really nice for snowy days too.