Howz it Bizz? I'm relatively new to the board myself, so welcome. I had my truck for about 3 1/2 weeks now and lovin' it. So far no major complaints...just a few minor stuff that can be resolved when I take it in for it's 1st oil change. You'll find tons of informative tips and positive testimonials on this board. If you wanna check out some reported problems have a look at this thread:
Problems according to date of Manufacture
As far as the XM question, I'm sorry I can't help.
Peace.