I have the Polk XM radio receiver in my system hooked up via RCA digital output to my NorthStar 192 DAC. The sonics are very good, but the seemingly endless choices of commercial free music stations is exceptional. Great component.
Polk Audio XM Radio Reciever A Winner
I just received the new Polk XM radio receiver. I planned a series of a/b listening tests with my old XM radio. It only took about 10 seconds of listening to realize how much the sound quality improved. Highly recommended. It is not quite cd quality but far better than the standard fare. FYI my system is Rotel preamp, Adcom mono blocks and Magnepan 1.6s.