i have the new cs and city select maps. everything is good and working great. i couldn't be happier. now, i'm looking for a good topo map that will give good detail. the 100k just doesn't look like enough detail for what i need. is there a 24k detail topo available for the 60cs? similar to the usgs maps? anyone's help is greatly appreciated. i'm in louisiana, so i need more detail for bayous, swamps, lakes... there is not a lot of elevation change, but the more detail, the better. thanks.