I, too noticed the discrepancy between SXM loudness and BT or FM. Seems odd. In any case, I've always thought the audio quality of SXM sucked. I haven't had much time to listen to the H/K system, but my first impressions are that it's a little lack luster from what I was expecting. I have a H/K system in my BMW 5 Series that sounds a lot better than the one in the Ram. I have a 10-12 band equalizer on the BMW system and there's only Bass, Mid, Treble on the Ram UI that I've found thus far. Some suggested turning the surround sound off but I found it to sound strange running regular stereo. Neither one of the H/K systems beat the JBL Synthesis system I had in my old '06 4Runner.