I am currently using an Emotiva XPA-5 amp and at 4 ohms it supplies 440wpc, and at 8 ohms it supplies 250wpc. it does wonders powering my M80v3 towers, VP180v3 center and as of tomorrow it will do wonders for the QS8v3 surrounds. it's a real workhorse, hasn't gotten real hot (it's gotten real warm but not real hot yet)and it gives the speakers everything they want when they want no matter the volume (of course i don't roll reference volume cause i want to keep my hearing!) they cost $799 with $25 shipping in the cont. USA. here is a picture with the front 3 soundstage, the XPA-5 is at the bottom left and my Onkyo SC-R5507P pre-amp is next to it. i am very happy and didn't break my bank either!
