Thanks for your help. Going to am event seems to be a great idea.
Decide what your budget is. Think about whether you want a touchscreen, buttons, or joystick. Do you care how many caches you can load into it? Is display, resolution, and mapping important? Do you want be most current model? Is GLONASS important? Do you want an electronic compass?
We can give you lots of advice, but none of it really matters since you will be the one using it. If you can, go to a store where you can get a feel for the unit, or perhaps a caching event where people may have different models you could see.