Is just me or am I having problems with XM on my 07 Tahoe. The sound quality coming from XM absolutely stinks as compared to regular radio, even more so as compared to using the CD or Ipod inputs. To me the sound quality is similar to internal computer speakers - very tinny. Even after tinkering with the EQ settings, there is no to very little improvement. I have the non-nav/non-Bose radio in my Tahoe. I had an overnight loaner from the dealership which had the nav/Bose unit and the sound quality was great from XM. Do I need new speakers?? A new XM receiver?? A sound processor that "cleans" up the output signals from the headunit?? Please help!! Any and all suggestions are welcome.