Hey that's great! I use a Van Alstine Omega3 in a Hafler 220 chassis, and a Mosfet120 done beautifully by Frank himself. And I've even tri-amped the system (My Maggies are on top of NHT1259 woofers placed in large cabinets). Also have a PSE Studio 4 amp. Bryston .5b preamp replaced by AVA Omega3 preamp. Omega3 DAC. Frankly, (pun intended) electronics aren't nearly as much fun to mess with as speakers. Speakers are fun. Also have a pair of MartinLogan Quests, some old B and W DM7Mark2, and a pair of B and W 303's for a good cheapy perspective.
The biggest MMG flaw I hear across a variety of recordings is their tendency to add sibilence to voices, and an overall constriction of sound. The MMG's are good speakers, but they have some issues,H like everything.
It is important to me to find product weaknesses, and not say "this is the greatest" (like I hear regarding Legacy and VMPS speakers). Can't let the most histrionic win. Still, show me a better speaker than the MMG for $550 and I'll go check em' out! Happily, as I can afford $550, unlike other speakers I'd like (see aforementioned brands).
So I would rate the MMG 4 of five stars, if such a statement matters...