It depends entirely on which "bells & whistles" you want/need. I bought a Garmin MAPgps 76S, because it had the right combo of bells & whistles. For me, I wanted mapping, external antenna & power, altimeter, compass, and a decent amount of memory, plus other features. I did a LOT of research first, and I am happy with what I got.
Good luck...
"Bassmedic"