My Dad has the Def Tech BP10's, and I have the M80ti's, So I can't compare directly to the M60's. THe Bp10's are good speakers, but we both like my Axioms better. The reason I got the Axiom's was so I could "one up" my Dad. I used to have Paradigm Monitor 7's, and the BP10's were noticeably better.

The M80's have better (tighter) bass, I like the imaging better, more of a 3D soundstage, more realistic sounding. The BP10's put out some pretty good bass, so probably the M60's bass output is close to the DEf TEch's. I'd imagine the imaging on the 60 & 80's is about the same.