That depends, it' seems to be the consensus around here that they are one of the best sounding amps out there period. As far as send other amps screaming from the room......
I personally run Wopls against----Denon POA -2800, Spec 2's, Bryston 4B, SAE 2400, Carver PT 2400, Marantz 250, and a couple others I've forgotten...