Thanks Musicfile, and sorry Darkmoebius, I've been out of the hobby for a few months now and haven't been checking Agon nor upgraded anything :)
In a way, that also answers your question, the MSB M200s has stopped my amp whoring, lol. (Not entirely true, I've also gone back to playing music more than listening.)
While it's not the best sounding amp I've tried (the Komuros were), the MSB comes out tops overall. Bearing in mind context-- driving a pair of mid-sensitivity speakers, here are its strengths: mids to highs, just about the best amp I've had in my system, only rivalled by (and in some ways soundling like) the Kronzilla on mids and Atmasphere on highs. Body and bloom are fantastic with some warmth like those amps I mentioned but none of the halo around images. Has those class A mids, none of the congestion or intermodulation distortion artifacts, images are rendered very clean but not clinical, textures are gorgeous but I'd say stopping short of lush.
Weakness: bass damping could be better, but then this is a balancing act, too much and it gets unnatural for me. The Komuro was perfect in this regard, and even the Linar I've had before had slightly more grip and definition. Where the Komuro beats them all is it might not come out with 10s across the audiophile checklist but it consistently comes up with 8s or 9s on every parameter except-- heat/environmental and maintenance. In comparison the M200 betters the Komuro on highs, almost even on mids (Komuro slightly ahead), loses out on bass... but but but, it doesn't run as hot nor needs tube maintenance :)
We've often heard it said, how the best solid-state amps don't sound like solid-state and, to a lesser degree, it's sometimes mentioned how the best tube amps don't sound like tubes. While it's tempting to say that both technologies are "converging," for me, they still sound different, although there is much less of the "traditional" sound we've come to associate with each technology. I'd never mistake the M200 as sounding tube like, nor the Komuro sounding like SS, but what's common is that both amps remind me less of how they're implemented.
Best regards!