If audyssey turned on any Room EQ features try turning them off (so that no EQ is Applied) and see how that sounds. I found that the audyssey EQ made my speakers sound worse. Many people have good results but I tried 3 times with mixed results at best.
You will want to change your fronts to small and use a crossover of about 60 or 80 hz more than likely.
Since the M80's are rear ported you can really change how they sound by moving them closer or farther from the back wall. Generally speaking, moving them closer to the wall will add a little emphasis on the bass. Is your music collection in lossy (mp3) or lossless (flac, wav or CD) format?
What subwoofers do you have?
I am not sure what "soft clipping means"... I have never had my receiver shut down once with the m80's (using denon 3808) And I have played it PLENTY loud. Did your receiver shut down on you when you say it clipped or what happened?
So you're saying for the fronts to have the cross over at 60 to 80 hz?
hmm I'm surprised about biamping; because the "guy" from the audio place said; "it's always the best way of doing it".
