Does anyone have experience with alternative software products that can display multiple map layers -- the same maps that I will have on my Garmin Oregon 650T? It would be nice if the software was a complete replacement for Basecamp, i.e., it could manage all the data loaded on the GPS (maps, waypoints, tracks, routes, etc.). But the main thing I want is the ability to view the waypoint and track data recorded on my GPS on top of a topo map that also shows trails. For me this means showing my GPS data on top of Cotopo11 and MyTrails maps (just like my GPS does -- except viewed on my larger computer monitor). Free is fine but I would also be happy to pay for a full-function software alternative. Heck, I would be happy to pay Garmin for it, if only they would provide it!