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

My speakers

I love these pushing my ATC scm-19's. Headroom baby!

I have the PSA S300 Amp, and I love it. Plenty of sweet power and a relatively small footprint.

don't muck with that D tripe.

stay with an A/AB stereo or mono block amplifiers.

your ears will thank you, as will your cost from the wicked deep bass.

ive listened to a lot of them, as im losing strength in older age, and i listened to a lot, none gave me the hair standing on my neck and arms, or the cold kinda jittery in my chest when i hear my stereo after 24 hrs of idle, no matter what i play, i get the boosebumps all over, and i love it. 

Right now I'm leaning towards the Cary SA-500.1 ES for $6,600.00 on sale until the end of the year 500W @8ohms and 1,000W @4ohms class A/B mono amps.