Dean, that was probably the most telling part of the whole comparison - the loud brass horn section at the start of the Star Trek movie. Unbelievable how different the speakers sounded on that particular part. Shelley (my wife) actually turned to me and asked how a speaker 1/4 the size of the 150 could sound better. Anyway, I am now a believer in the vertical center channel.
Casey, I think in order to run 2 M2's you'd need to locate them above and below the screen, not side by side or you start creating a horizontal array again. I could be wrong but that seems logical in my head.
