Eddie, Sirius XM has audio quality equivalent of about 64 kbps or worse compressed .mp3. I have seen the actual figure somewhere. It didn't used to be that way, but as they added hundreds of sports and news channels for each major metro area, the bandwidth had to be divided up and many music channels suffered.

As a result it's significantly worse audio quality than a strong broadcast FM signal.

The only music fans that I have ever met that think Sirius/XM has decent audio quality for music have existing hearing loss issues. Early on in XM history, when there were fewer channels, the quality was about on par with 128 kbps .mp3 files, but it has significantly declined as channels have been added. The internet stream for these does not suffer the same issues as it doesn't depend on feed to/from a satellite.