Any GPS unit recommendations?

I looks like a GPS unit is in the cards for the VMB trail crew one way or the other. I'm checking into which unit to get but I'd like to know if anyone has any recommendations on particular brands/models and also vendors.

I'm also curious if it might be better to have some kind of microcomputer or even a phone that you can use as a GPS but also plot out your position on google Earth in real time.But a GPS would be fine!

The whole GPS thing will really come in handy negotiating the Atumn Olive jungle at Trexler and the eventual western side out Sals.