Just to add my 2 cents...

I have M80s and a Denon 4311CI receiver. I however use a 3 channel ADA1000 for the M80s and VP150 center. Why the external amp?

- I like running my M80s as Large and my Denon would shut down on loud peaks. It can't handle the 4 ohm load.
- I normally play at about -5 db levels which is loud but comfortable for me. I want the amazing peak power the ADA1000 provides for the peaks high dynamic range movies and good quality music can create.
- Every once in a while I do turn up the dial and even if it's only once a month, it's nice to hear loud and *clean* sound that the Denon simply cannot do.
- Finally, I love my Axiom speakers and it is comforting to know that those insane moments when I do crank it up, even if it's only for 30 seconds, I won't go into clipping and damage my babies.

These are reasons I use an external amp.

For every expert, there is an equal and opposite expert.