Thanks for the info. So the VP150's sound good with the M60's? Right now I have Polk audio R10's fronts and surrounds along with the CS175i for center. I'm sure with the Axiom's I'll notice a huge improvement with my Denon rcvr.
I was a bit concerned about the fact that the M80's are 4ohm rated, but my rcvr is 6-8ohms. Does having speakers with ohm rating differences and efficiency differences cause any problems for receivers or in sound quality?

I really appreciate your help in answering my questions.