Thanks All, for the fast responses to my question - interestingly, the comments on the Klipsch's tend to support my general feeling about my Klipsch's when I've compared them to other,newer speakers that I've heard at various friends places - the impression that the newer speakers had more airy(?), pleasing highs than my Klipsch's did.

So, I'm really looking forward to hearing my new M80's (and really hoping Axiom can get them out the door soon :))