The 180 made a HUGE difference in my setup. Even my wife was impressed with the sound coming from it. I had the M60's and decided to go with the 80's to complete the 4ohm front soundstage.

Originally I had a Denon 481 and everything worked great. Later I had added a XPA-3 to power the fronts. That helped open the speakers up some more.

Then just last week I added an Anthem MRX-500 after selling my Denon and I am hearing things now that I have never heard... My system sounds EVEN BETTER now.. Couldn't be happier!