I have the National Geographics Backroads 3D for all 50 states and really like it. The NG Topo for the individual states gets a bit more detail. I paid $40 for mine at Sams Club. If you have any specific questions about it give me a holler!

Topo software will not list trail difficulty. I find the local 4x club web sites are a great source for that. Especially since trails change from year to year from the weather and use.