Was looking at the different models Garmin has. Does anyone know what the "Geocaching mode", "Outdoor GPS games", and "high sensitivity receiver" features are? Also, some models do not have electronic compasses. Isn't this fairly necessary for our use, or do those models have something different? What budget-minded model is best? We currently have the Etrex Vista, but the rubber seal is starting to fall off and there is no USB hookup, which is a pain. Any suggestions? Thanks! Spongebob14