I am asking this question because it appears (according to home users) that Sirius has better sound quality than XM. So I'd like to know, on a scale from 1 to 10, how much you like satellite radio compared to FM in sound quality (with 1 to 5 for liking satellite radio less than FM). I'd also like to know whether you use XM or Sirius, whether you use a portable or a fixed satellite radio tuner (for those with satellite radio ready receivers), whether you use external amps or just the HU for power to the main speakers, and whether you have a "reference" level HU (Pioneer and Kenwood being the only brands that offer one AFAIK). I want to see if the sound difference between XM and Sirius becomes more noticable the better the car stereo equipment used.
And I think this Sirius/XM sound quality difference is a property of the transmission, not the equipment used. Also, I'd like to exclude anyone using FM demodulation for their satellite radio/car stereo link from the survey.
This isn't scientific, but I'd like to see if there's a trend.
If anyone has had a chance to compare both XM and Sirius on the same system that would be great, but I don't expect that to be the case for anyone.