I would totally expect the 100s to best the M5s, but how much better are they than the 80s?

I actually got the 80s in a walnut high gloss finish. They are nice, but we actually got used to the black piano finish of the SVS. It suits the decor of the room better so i think i will have to get them in that color if i decide to move to the 100s.

PeachTree 65se, PeachTree D5 and SVS SB1000 - Stereo
M80s, M22s, SVS PB3000