Hi,
I have a Garmin Oregon 450. Very happy with it, aside from the common complaint that the display could be a little brighter. I hear a lot of people extol the virtues of the 60CSx. I think either would do everything that I use it for. Yes, I have been doing some research on early history of the area and plugging in waypoints (either via Basecamp or Google Earth or ArcGIS).
I have to mention that I recently bought a tablet, the ASUS Transformer, and it is amazing. In Google maps, I tapped an approximate location of a ghost town (in the middle of nowhere, 4wd roads, etc.) and tap 'go' and got turn by turn directions. (No, dummy, turn around and go back to that river bed and drive up it,
). I also bought a little app for it called BackCountry Navigator Pro ($9.99!) and have imported all my waypoints into it as well. It is awesome, gets free beautifully shaded topos from ArcGIS and a number of other sources, as well as openStreetMaps, Aerial Satellite Photos from USGS, etc., and you can change maps on the fly. My tab is WiFi only, so I have to download topo sections for out of network range, easy to do. I had got the car mount for the Garmin Oregon, but had trouble seeing it while driving, so am waiting for the car mount for the tab. Got a case for it so I can throw it in the daypack. I still use the Garmin most when hiking because I always carry extra batteries for it. The tab gets 9 hours on a charge, but nice to have a backup, and it's easy to mark a waypoint for the car... I do a lot of bushwhacking and my usually good sense of direction has failed me a couple of times, resulting in some very long hikes!
Congrats on the GPS, You'll have lots of (safe) fun with it!!