A couple weeks ago I received a new GPS that obsoletes about everything else available prior to now (at least for a reasonable price) - The Delorme Earthmate GPS PN-20 I've not mastered this one yet, but so far, I've been extremely impressed. And the viewing screen is the only one I've ever had that I could actually see well in bright sunlight.
This particular GPS is made by DeLorme (the map people), and it overlays real USGS 7.5-minute Quads along with aerial photographs.
You can check it out at www.delorme.com/PN20
I received a reduced price introductory deal on it (which included lots of accessories and aerial downloads), but the regular price is only $369.95 --- a real value considering . . . . . .
What I like about it best is that I now have "real" high resolution top maps (USGS 7.5-minute Quads) which are the same on both my handheld GPS and my computer, as well as aerial photographs. This solves my biggest past complaint with many other GPS units I've had in that their proprietary topo maps (by Magellan & Garmin) was not nearly as good or detailed as the Delorme maps I used on my computer.
Other key features include:
High resolution color screen with total clarity in conditions ranging from glaring sun to full darkness.
Outstanding signal retention under forest canopies.
Virtually unlimited data storage (uses SD cards in a waterproof storage compartment).
Electronic compass.
And it's completely waterproof.