Without doubt, I prefer multichannel recordings. For me DVD-audio and SACD are both superb. As for PLII,PLIIx, Neo-6, etc., I find that when a stereo CD has been recorded with high quality, use of these DSPs can result in a sound almost as good as a multi-channel recording. If the CD is not recorded well, I don't expect that any DSP will help it much.

maphiker