I had Sirius prior to their merger with XM, and I cancelled my subscription shortly after. The two had a huge overlap of channels/content, and when they decided which channels to keep it was invariably the worse of the two options IMO. Also, they did something that massively degraded the audio quality, and it sounded like I was listening to a low-res MP3 from the early 90's. It basically made my ears bleed. I couldn't stand it and had to cancel. The audio quality problem was really the nail in the coffin for me.
Has anyone else who likes Sirius/XM thought the audio quality was terrible? Is it any better when streaming via cellular? Maybe it was just the receiver or DAC in the Acura TL that was poor quality?