I just ordered mine today and I can't wait for it to arrive!! I occasionally listened to the Delphi SkyFi unit connected via a mini-jack to RCA into my preamp. The sound was just okay at best, but probably better than FM. The SkyFi had a cheap DAC and no digital output (although I did see somebody offering a modified SkyFi unit on Audiogn with a digital output). The new Polk XM receiver has both Toslink and coaxial digital outputs. I can't wait to try it with my Levinson 360s DAC. I'll post a review when the unit arrives and I get a listen. I hope the sound is better than the digital stream I get from my digital cable TV provider (Time Warner Cable). They offer Music Choice which has great music programming and a huge variety, but the PCM stream is far from CD quality, although again probably better than FM.