I noted the CSF? (child safety factor) above and ultimately went with the M60s. Are they worth the extra $250? Well, one reason I kept the 60s is that I felt they filled my room a little better (nearly 30' long) but that's only part of the story. I think the main reason I kept them, and I KNOW its why I'm glad I made that decision is their stereo performance!! I initially set up my HT system for something like 90% DVD 5% TV and 5% music. But, after experiencing the M60s in stereo!!, everyday I am trying to find more and more ways to spend my time down there listening to plain CDs and old vinyl. Well, that's my 2c.