Garmin, i have a colorada. I also have a magellan sport trac.
The garmin in more user friendly but your heading arrow jumps around a little and can get confusing.
The magellan is not as user friendly but is more consistant with your heading arrow.
I started carring a compass recently due to my GPS letting me confused. Its nice because it shows you track so you can always go off your track (what you walked already), as long as you have a compass.
Garmin 60csx and get the Topo US 24 K. Plus a cigerette lighter cord for in the car. Search the net and your looking @ $425 for all. I love mine. Overall it had the best reveiws on all the sites I checked.