The Garmin E-trex series has to be the best GPS models for geocaching. I use the E-trex venture, but the more expensive the model you go with, the more precise your geocaching will become. If you are looking to purchase a GPS for geocaching, avoid the plain yellow E-trex. Try to find a bargain on one of the ones which feature mapping abilities. The E-trex Venture does this in the most basic sense. It has a map which just shows waypoints, routes, and tracks. The E-trex Vista is the premier E-trex model as it has color mapping with city/streets display. Try to go for the nicest unit you can find. Remember, internet auction places like e-bay are the best places to find GPS units. Do not, however, make the mistake of getting a unit which cannot be handheld. Sticking with the Garmin E-trex series is the best way to get going with geocaching!