I gave 'Revolutionary' a spin today. Track #2 - Bach: "Evolutionary" Toccata and Fugue in D Minor - is downright scary with its bass extension & the length of time that these notes are held.
While my M2s handled the mids & highs with ease, I thought that my little EP400 was going to cough its woofer out onto the floor; however, it made it through OK!
The dynamics of this SACD are amazing, from the softest, almost inaudible keyboard notes to the sudden blasts of the big foot pedal notes. I can't imagine what a really big system must sound like on this track...