I restored an older pair of MMG’s last summer, and after considerable experimentation with placement and speaker cables in my relatively small listening room, I’m astonished at how good they are. I’m using a couple of muscular mono tube amps and the Maggie’s have surprisingly good and solid bass- down to about 55hz. Powered by a decent solid state NAD amp bass is a bit "punchier" but overall sound is not as sweet.
I think the MMGs are absolutely THEEEE greatest value in our hobby, at least when it comes to speakers. The only room treatment, thus far, is tube traps in the front wall corners. I think the next experiment will be some diffusion panels. The floor is carpeted and I’m using the factory feet. I’ve tried stands which raise the speakers straight up from the floor and the verdict is out on whether the sound is "better" or simply different.
I'd love to audition the .7's in my room with my gear, but for now- I'm more than happy.