Check out Garmin's web site. I just replaced a 12xl unit with 1 of their new rino 120's. It's supposed to be waterproof- i haven't given it the drop test yet. it's got memory, mapping, pretty much 1 hand operation, and it also has a walkie talkie feature all in the same unit. you can beam your location or a waypoint to another user w/a rino unit. The joystick is a little tricky until you get used to it, but nothing is perfect.
happy holidays
davey