Coach,
I was also undecided on which speaker to get for mains, the M80Ti or the M60Ti. I had several long discussions with Axiom about the size of my room, what I was going to be using the speakers for and type of receiver that would be driving the speakers. They explained to me as your not getting better sound with the M80Ti, just the ability to play that sound louder (much louder). Since I was looking for clarity and not overly concerned on how loud the speakers played, I went with the M60Ti for mains. I also talked to several different people at Axiom, basically calling back a few times so I could get a different point of view.
