hmm... I dunno, I'm no "class" expert, but the Marantz Ruby is some type of class D and sure sounds nice to me and to the various critics I've read. The Technics SU-R 1000 is None Of The Above, and it is supposedly hella great.
I'm not married to any "class"... there is no one class that universally sounds great or bad. It's all in the execution.
another possible compromise if you gotta have at least some "class A" in your life is the Arcam amps... A first x watts, then switch over to B (?) after that.