xm radio
#3
I like Sirius better. I have both. Well my wifes car has XM, and mine Sirius. I think the programming is better on Sirius. Both will give you awesome clear chns, so check out the program guide on both. If you do anything however DONT go with the cheap plug in the cig lighter models of either. Go for a XM or Sirius ready stereo, it sounds so much better!