I have been using expertgps for 4 or 5 years. It was 60 for topos of the us. It works great for me. If your GPS already has the map loaded I think you can plot on the computer then download to GPS = it will show your route on the GPS's map. And I I think it will go the other way for you as well. It does on my GPS. There is a free trial version if I remember corrrectly. The thing about me is- I'm too cheap to pay 100.00 to get a couple of States at a time from that other software maker. Even though it has some neat features. I use my GPS when I am bushwhacking, mostly. Oh, yeah--- I love the way the software connects to google so I can see terrain from different angles. When the leaves are down I like to explore ridge lines that connect trails so that I can do a composite bushwhack using trails to get me to and from. Just sayin, there is a cheap option out there.