For two channel music you will see a big difference, particularly on the bottom end. I noticed a big difference between the M60 and M80 in that region.

For HT, I'm not sure you would notice much difference.

If you want to upgrade the theater, I would go for more/bigger/better subs before changing the mains.

Last edited by fredk; 10/06/13 12:18 AM.
Fred

-------
Blujays1: Spending Fred's money one bottle at a time, no two... Oh crap!