http://www.magellangps.com/Products/Triton
I use the 500 shown here.Magellan used to be a real pain and their support sucks but I just found out why.Magellan has been bought quite a few times in the last few years and the new owners are putting out their own models and discontinuing the triton and others in favor of their explorists and such so the Tritons will have no more updates but I find they work quite well with what they have and my model has come down from a 400 to a little over 100.What I like about them is you can put real topo maps onto them either through Nat geo's TOPO Program or you can download free topos from the USGS site or aerials from google earth and NJGIN and calibrate the jpeg files you save into Rmp map files and put them into the gps and navigate with them.I imagine similar things can be done with Garmin but I don't know how to do it and I don't think they take real topo maps,by real I mean USGS quads.One downfall of the triton is the small screen,would be nice to have a larger screen but my unit will read out in feet all the way up to a mile which is real nice when bushwacking through thick stuff toward a waypoint and your tired and want to know if "we're almost there yet?"
The triton and it's software can be a pain learning and getting used to but if you go that way there is an excellent forum just on triton gps and they will help or I can help you if you go the triton route,the advantage of garmin is many more programs and software are compatible with garmin then magellan but I grew up on USGS topo's and thats what I want,gotta have them benchmarks too

Al