Time to buy a class D amp?

I think its a matter of gear combination and synergy. 

Ive had SS and tube class A (last one with 300B tubes) and now I have the Nord Acoustics NC500DM class D amp with Rev D boards and Sparkos Op Amps and I prefer it over all of my previous amps. Its cristal clear, with amazing dynamics, incredible soundstage and neutral tone. My previous class A amps sounded "dirtier" to me. 

I think that when you have a considerable transparent amp (as speakers), it will show the flaws of your source. The more I improved the quality of the source (AC Power, digital signal processing, cables, DAC, etc) the warmer the amp got.

I've heard +100k systems with class A and AB systems that, to me, sounded harsher (and worse) than my current around 20k system.

Well, in my experience, my current class D amp is ultra dead silent, and not so much (by a wide margin) my last two class A valve amps, one of them a more expensive 300B valve amp.

This much better signal to noise ratio of my class D amp makes it sound much cleaner and with less grain. Highs sound smoother on it because of that. 

Thin? Well, if you get the right gear to feed it (AC Power, DAC, correct digital signal processing, neutral to warm preamp, etc) you can get a very detailed sound, with amazing soundstage and dynamics, with out losing smoothness, body and tone, at all.

Im sure you can get good sound with class A amp, but you also can do it with a good class D amp, at better price in most cases. Also lighter in weight, cooler at running temperature and with less energy consumption. 

Hello George
You seem to know a lot about technical issues about class D Amps (I dont), but in my case I dont feel any of the problems you have mentioned above, if I understand you correctly. 

When I listen to music at low levels at night (everybody is sleeping), I dont feel the mids or the highs rolled off or not involving at all. In fact, as the AC Power is cleaner and the ambience noise is lower, I experiment the best of the music as it gets much more involving, smoother, with more dynamics, detail, better tone and with an incredible soundstage.

Also, when I listen loud (I try not to do it often for my earing safety), I dont feel the sound harsh.

On the other hand, I've listened to multi thousand dollars systems (+120k), much more expensive than mine, and I've found them harsher and with more digital flavour than mine. And those systems had class A or A/B amps.

In fact, I've had class A valve amps that didnt sound as smooth and grainless as my class D amp, at all. 

I dont want to start an endless and pointless discussion, but my experience doesnt follow your theory. I guess there must be exceptions. 

My amp is a Nord Acoustics NC500DM with Rev D boards and Sparkos Op Amps. My preamp is the Audio-gd Master 1 and my DAC is the Audio-gd R8. I feed the DAC with the SOtM SMS-200 Ultra Neo going through the Gustard U16 USB to I2S converter. My speakers are the Q Acoustics Concept 500 floorstanders.