Is the PS audio M1200 D class amp worth buying or should I stick to A/B class mono amps

At the risk of engaging in hyperbole: they are SUPERB and an incredible bargain. I’ve used them to drive everything from Avant-garde Duo Omega G2’s to Martin Logan 15A’s and CLX’s to MG 20.7’s ALL with outstanding results. Wonderful tonal balance, ENORMOUS soundscape and wholly unrestrained dynamics! Never harsh. In fact, “tube-like”. PLUS there’s a 30 day in home trial period. Can you tell I like them? 😀

And yes, I was once tube devotee exclusively. ARC, VTL, CJ,  etc. But on my CLX the PS Audio were clearly superior to CJ ART 150. Those are all great amps, but the PS Audio bested them. 
 

caution: the M700’s are NOT THE SAME. They don’t have a tube input stage.