What GPS unit shall I buy for geocaching?
The bad thing about Geocaching is that unless one already has a GPS, there not going to enjoy it. The best would be a Survey grade which puts one within inches of a target site, and that would be a Trimble with computer hardware starting at around 5000 bucks. I use Garmin and since I spend a lot of time in the wilderness, I have a dashmount so I csn see what speed and what direction I am going at a glance, and with maps this unit cost me 400 bucks. Perhaps you would be better off finding out which model he already has and buying him accessories, like an autocharger or a dashmount. Perhaps a set of 7.5 maps of your area would be thoughtful? They can be gotten at any Geology Department at your local university, or at a Blueprint shop. Even sporting Goods stores carry them.
