I can comment on the difference between the HSU Research VTF-2 and the Axiom EP600 as I have made that progression myself. My listening area is small to medium and the VTF-2 blended beautifully with my Axioms. I had no complaints at all. However, when I got the EP600, I realized that the output and musicality of the Axiom sub was far superior to the VTF-2. For both movies and music the EP600 covers the LFEs very nicely. I can't comment on the Moniter 11s or the M80s as I have not heard either. I do enjoy my M60s though. Welcome to the forum.
David
