I don't own either. But it should be remembered that the M60 is smaller than the 80, but not smaller than its competitors(which I do own). What impresses me is that M60 offers a separate mid-range driver along with two bass drivers, for a true 3-way configuration. That is impressive at the price. My PSB's use a two-and-a-half config, and skip the separate mid-range, using one bass drive crossed over higher than the other. I love the sound, but don't deny that, in theory, you should get more accuracy with the dedicated mid-range driver on the M60, as compared to many good competitors.

Just a thought from an outsider.

Panny 3000 PJ, 118" Carada, Denon 3300, PS3, Axiom QS8, PSB 5T, B&W sub, levitating speaker wire