I've heard neither the Infinities (does one change the "y" to an "ie" when it's a proper noun?) nor the B&Ws. But, as our own Ray3 states above, he did some extensive research before buying his Axioms, and he says his M60s sound very much like the B&W 703s, but for a lot less money. Your M80s will have a sonic signature almost identical to the M60s with a bit lower extension, and bunch more volume. Based on his experience, I think you'll be very happy with the M80s. (P.S. If you're not................BLAME RAY! )

Jack

"People generally quarrel because they cannot argue." - G. K. Chesterton