Why would I be constantly looking at the map? Nor do I ever use hi lighter until end of riding season when I highlight everywhere I went. I plot out the route and write it down with sharpie,then slide the paper under my map pocket. Extra RAM comes in the form of more sheets of folded paper...lol
All I need to do is glance down at my directions. But to each thier own in travelling,I have had nothing but terrible experiences with GPS and I find it limits my interaction with locals,whom I ask for directions ( when needed) ,recommendations for campgrounds,grocery stores,whatever.
I may take another stab at trying to figure out the whole xm thing that apparently works through the GPS.......or something.....if I decide to sell, it will be posted up here.