Speaking from experience, I had the Yam rx-v1500 which was no sloch @110 w.p.c. with the 60s. I still have my 60s (not 80s) I also like to crank it up, the biggest difference is that it is not that much "louder" but with seperates (i have the Sunfire grand signature @ 600 w.p.c @ 8 ohms - 1200 w.p.c. @ 4 ohms)it is just so much better sounding. I feel it actully brought out the full potential of the speakers. It never sounded "bad" at high levels, it just sounds much better now. When I listen to loud levels, the speakers are much more detailed, and coherent, tight, smooth, there is not the audible quality drop off at extreme high volumes.
