Ok thanks everyone. I'm going to go with the Hcx. It will double duty on land for hunting and possibly over seas if my unit gets deployed to the desert. I know it doesn't float but I'll attach a float to it just in case it does slip out of the yak and most of it's time will be spent in a clear waterproof bag so hopefully I won't have to test out how waterproof it is.
Thanks again,
Chip