I've been using Delorme's TopoUSA for a couple years now and for the most part it'll show you everything right down to the wash you're driving in that you thought was a road.
The satelite imagery that you can get and split screen into the program is awsome. Shows clear cuts, farm land, even houses.
The biggest gripe I have with it is that if I leave it on too long my laptop slows to a crawl. Then it's time to close it down and re-aquire the gps satelites again. No big deal, just a pain in the butt.