I have had XM Radio in my last two vehicles and it was the only source of music I used, other than the occasional CD. I felt it was worlds better than FM, especially since it is commercial free and clearer sound. That being said, now that I have HD/FM radio and the ability to stream Pandora, the XM Radio in this car (S-GT) sounds very muffled. I have to turn up the volume for XM several notches higher than regular radio and/or Pandora. Suddenly, I feel XM does NOT have the best sound and I prefer listening to HD Radio, even though I have to suffer through commercials. Does anyone else notice this?