In reply to:
The front two M80ti's will get 240 wpc. But since they are 4-ohm speakers, I guess it will effectively be 480 wpc! The M80ti's are rated for 400 watts, but Jean-Claude (?) at Axiom told me they can easily handle 1000 watts.
Biamping the M80s as you describe will not give you 240 per channel. It will still be the rated spec for what ever the Denon will do at 4 ohm. Lets say you see a 50% increase in power (typically) with the Denon @ 4 ohm, that would give around 180 per channel. Biamping does not double the power to the speaker. Each section of the M80 will still be getting the same rated power as if you left the binding post straps in place.
