I had the M700s with my 96dB efficient Emerald Physics KCII speakers, in a no-tube system and liked them a lot, but my room is quite large by most standards. During my time with them, I got a 30 day trial with a new amp from Tweakaudio, a EVS1200 dual mono,
highly tweaked,
based on the same Icepower modules as in the M1200s, but no tube input. The price was about the same by 2xs+ the power. I kept it, and sold off the M700s.
hth
hth