First, I'll assuredly keep the MFA mono amps and maybe have them taken to the "ultimate" level by Mr. Frankland. He's already updated them once with excellent results. He also updated the Lumi as far as possible, and when the preamp came back, it blew me away with how good it sounded.
Second, If I were to sell the MMG's and get into a 3.x series Maggie, I could bi-amp, using the MFA's for mids and treble, and a decent, moderately priced amp such as NAD. Initially I was reluctant to consider 6' tall speakers in my relatively small listening room, but that's no longer an issue since it's a dedicated audio space. I will also audition the .7's as another alternative and forget biamping. And, on the audio to do list for 2016, is room treatment, beyond the tube traps I already have in the front wall corners.
This seems to me, to be a much more logical approach- perhaps the best of all worlds for me given my taste in music and how it "should" sound.
Happy holidays to ya'll!