This is one thing I still don't understand. "The soundstage changing". If I wasn't sitting in Jays room listening as he switched the speaker wires from the Denon to the Axiom and hearing the noticable difference between them. I would have assumed since the Axiom had more output the sound would just be slightly louder. The only thing I can possbly think is happening is using a receiver vs using seperates, where the receiver may "colorize" the sound slightly and the Axiom amp brings out the best of the speaker especially the M80.
Just my one cent thought on this.
Mel N.