I have had XM for about 4 years now, first on a Pioneer deh p7300, then as part of the factory pioneer system in my scion tC, and now with the D3. The sound quality I am experiencing on the D3 is absolutely horrible. The stock XM sounded so much better, I just don't get it. I am so sad, as I have grown to love XM, but this quality now sounds like a 32k mp3. Anyone have any thoughts? I have the two antennas (xm and nav) right next to one another, that is the ONLY thing i can think of that would cause this, but even that doesn't seem like it would do anything. I am about to cancel my XM.