I'm using two dedicated 20a circuits with cryo'd outlets from Sound Applications for my Mono Extremes. I have a Running Springs Audio Haley for the front end components. I'm still trying to decide if I like the mono's better direct to the wall or through the Haley at this point. They sound great so far either way but they're just getting burned in right now. The biggest improvement I made was going to the Black Sand Silver Reference MK V power cords. They are far and away better than any cords I've heard in my system.
Tom