I didn't vote, since I don't have the M80s, but I find the bass on my M60s to be punchier, more musical and less boomy than when my sub (an Hsu STF2) is turned on. There is definitely less bass without the sub and the room doesn't appear to be "full" of bass sound when it is just the M60s, but locality of the bass is improved (which is a good thing, I think, for musical selections where a localized bass is not objectionable).