I can say I have the same feelings as Terzaghi - I feel the M80s alone provide the best feel for music that is only 2 channel. This does vary by recording some, but for the majority this is what I prefer.
This made me also wonder if something was wrong with my setup, but the SMS-1 and EP500s do perform excellently for multichannel soundtracks, no matter if they are movies or music on DVD, SACD or DVD-Audio. I don't know what is left to put the blame on but my processor that is converting the 2 channel to 5.1. I gave up trying to figure it out and just enjoy the music in the method that sounds best to me.
