I just liked the extra clarity, mids and upper range, the M80s have over the M60s at all volume levels. The lower bass extension is just a nice plus. And I do like my M80s over M22/sub, it does sound slightly fuller and in my new house the M80s are better than ever \:\) I doubt that lack of upper bass range in the M22/sub combo is really all that noticeable if not for A/B testing.

Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70