My experience with two-channel and multi-channel music is that two channel recordings sounds flat and lifeless, no matter how good it is, when you go back to it from the multi-channel version of the same recording. It takes some two-channel listening time to readjust and enjoy two-channel again. Multi-channel recordings seem to energize the whole listening room to a much greater degree than a two-channel recording can. IMHO.
Russ
Russ