Alex:
The M80ti towers will sound even better after a few weeks of use! After much experimentation with the speakers and the Denon 3805, i am using these settings (in case you are interested):
Room EQ OFF.
M80's are "Large" speakers.
LFE Crossover setting at 40Hz.
LFE sent to Mains+Subwoofer.
I know most people set the crossover at 60 or 80Hz. But the M80's are supposedly good for 25hz-22khz. And I have 4 M80s and the EP600 subwoofer. My 5.1 channel setup is used for both movies and music. Hearing multichannel music from this setup ROCKS!