My sales guys pointed out that you won't need your disks with XM radio.
I tried to play my own disk I burned on the computer, and it wouldn't work. I've used it in our new Excursion and in my 03 H2. Why do you suppose it did that?
jason427- I used a Garmin 2620 for a while and I really liked it. It has great mapping, and extra space to download topo maps directly into the GPS. Another nice thing about it is you can use it in any vehicle. It has touchscreen, remote, and vocal directions.
So far, the navigation in my new 05 doesn't compare. Besides the fact that you can't enter anything while underway, it doesn't even tell me elevation. (unless I've missed the setup for it) Kenwood and Alpine also sell touchscreen GPS kits that fit in the dash and will allow the steering wheel controls to work. Good Luck.