To my knownledge, there is no SACD drives for PC's, as the format did not catch on enough to mass market along with copy right/protection issue's. So there is no way a PC/MAC can compare in playback to a SACD player. Now you can download Hi res files from some sites, but are they equal to SACD standards? and the limited selection of music choice of both SACD and Hi Res music make them both only a nitch. I own a few SACD and DVD-A disk hoping the format would catch on. I have read that there are a few programs that can rip DVD-A since they do have a 2 channel mix encoded. SACD will have to stand on its own.