Please dont take this the wrong way, alot of people dont notice the difference in sound between XM (Siruis) and CD mainly because they don't have the ear for music that a few people on the boards have developed. I for one have XM, (I hate XMs quality but I do use it for about 3hrs a month when I dont feel like listening to the music on the P.C.) My wife also has XM and loves it to her it sounds just as good as the CDs that comes out of her stereo. Kind of like the loudness button feature on radios, Some people use the button because they love the way distortion sounds then they maxout the radio, but myself I would not use the loud button when I had CD players because I could hear a difference in the music other then making it louder.
Aron