I compared a Comcast cable box playing digital cable radio to an IPod Nano playing 128kps through an DLO dock using in ceiling speakers in a clients home and the IPod blew way the Comcast box. In another clients home, I compared a Sonos ZP100 screaming Rhapsody to the Comcast box, through in ceiling speakers, and again the Comcast box lost.
In a friends home, I compared the new Comcast DVR to a modified Squeezebox3 through an outlaw 990 processor, outlaw 5x200 amp and VSR VR4jr's. Again the Comcast box lost. BTW, the squeezebox was playing 128kps internet radio.
WMMV.