Anyone Using XM or Sirius On Their System?

I run Sirius through a benchmark dac from a dish network satellite box via toslink. The dac is an improvement but not worth the cost unless you want it for other uses also. However, it is not FM quality as compared to my tuner and clearly sounds compressed, especially at slightly elevated listening levels. I tried the above-mentioned MF tube buffer but did not notice any obvious improvement. That said, Sirius is free on dish and I really like the classical programming; it sounds fine at low volumes and actually has a remarkable soundstage that occasionally gets my attention. If you enjoy the programming, it is worth it, especially if you live in the boonies.