I got a ContourGPS back in the day and it is still going strong and I'm still sporting it.
Mainly used with mt biking but also shooting, scuba diving and strapping it to the dog.
When the GPS version came out I thought that contour had a leg up on gopro with the bluetooth to the iphone option but gopro has caught up with them on that area.
I find that a lot of mt bikers/road bikers/dirt bikers really like the compact size of the contour BUT the gopro wins hands down with the chesty mount if you want that. I haven't stayed up on the latest/greatest but gopro's hero3 black shoots extremly fast if you are looking for slow motion.
I looked heavily at DRIFT but it was to bulky IMHO.
When i shoot, I have a mount ziptied to the top of my hearing protection:
I have seen others use a hat mount setup where it mounts to the side of a standard baseball cap. If you have non-headset style hearing protection.
and fyi:
http://www.geekwire.com/2013/investo...al-19-million/