I'm thinking of buying a new DVD player, maybe the Sony NC600 or the NC650. But I don't know if I can take advantage of the SACD playback of the NC650, I only have a mini-hifi stereo(100wx2). In a different thread someone told me I need 5.1 to use SACD. I thought SACDs (could)have both multi-channel and stereo tracks. Could somebody help me understand this? I'd like to know if I'd be wasting my money on the NC650. I'm mainly looking for a DVD player, but if I could, I'd like to try out SACD. Thanks!