I got the Magellan SportTrak a couple of years ago and love it. I typically don’t leave home without it, though I do carry a map and compass as well (extra batteries add weight). I would look at the smaller versions out now (Garmin, etc.) and wouldn’t bother with the walkie-talkie version. As I understand, you can only transmit your posit. to someone else w/ the same system and, with thick forest, you won’t even get a 2-mile distance on the signal.
my 2 cents…