What do you like better? For me, I had both for 3 years (XM in my daily driver and Sirius in my wife's car). Now I am driving her car daily (her new car has Sirius),really missed Sirius. When I had XM, I listened to my IPOD more than XM. I have Sirius on all the time and rarely listen to my IPOD in the Pacifica. Favorites: The Pulse, Hair Nation, and Coffee House.