Re: Hand held GPS?
Have only had experience with Garmin and Magellan.
I have the Garmin Vista HCx that I use for back country camping, boating and driving. Its fully loaded with marine charts, detailed road maps (auto routing capable) and topo maps. It is waterproof as well and very robust. It goes in my backpack, on the floor of the canoe etc etc and has never let me down. It been in the rain, hot sun and bitter cold out on the lake ice fishing. I have windshield mounts in both the car and boat. Battery life is tremendous at about 30hrs.
My friend just got a Magellan Triton 500 and I loaded some maps for him. In doing so, I played around with it a bunch and found it far inferior to the Garmin. Navigation buttons too small and hard to use, poorer quality maps, limited user configurable options, short battery life (10hrs) etc etc. The other thing I discovered is that there seems to be alot of problems with the operating software in these units. Alot of people unhappy with operating problems and very poor customer service.
Thats my 2 cents based on actual units I have used. Good luck in your search. Do your homework and research research research. Get the unit that has the features and maps that you want, don't buy solely based on others opinions.