I've had both the Aperion 6T's and Axiom M80's in my house for 3 weeks now. As far as bass, both sets will do equally well down to about 40hz. Below that point, I found the Axiom's extended a little lower with a bit more authority. I think some of it may depend on your listening habits and how loud you play them. The bass dropps off pretty quickly around 35hz, but if you intend to play them pretty loud (90db+) you may get satisfactory bass out of the M80's, I was pretty impressed with them at around 100db, but I never listen to anything that loud for more than a minute or so.
Of course, my definition of satisfactory bass may not be the same as yours...