I have no personal experience with any of the speakers you mentioned. But, it often has been said, here on the forum, that the the M60s, which sound very much like the M80s (the 80s are able to play a little deeper and louder), are tonally very similar to the B&W 703s, at one third the price.

Hopefully, others will confirm or deny this.

Jack

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