I am running M60s with an HK3270 stereo receiver, which I believe is about the same power as a 235 in stereo. It wasn't quite powerful enough to make M2s fill the room, but it sure does the job with M60s.

M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8