I too have the Direct TV and the XM feed is a big step up in sound quality over the Music Choice. All I have is a Phillips reciever that I bought from Direct TV for $35. I do agree that some channels sound much better than others, thankfully 850-Jazz and 852-Beyond Jazz, my primary choices, sound quite good...
Just a guess, maybe (finally) being part of the minority is OK, there might be a study that says pop music lovers do not care about sound quality as much as jazz lovers...
Just a guess, maybe (finally) being part of the minority is OK, there might be a study that says pop music lovers do not care about sound quality as much as jazz lovers...