Here is my two cents: I have not experienced listening to many Class D amps, but I have not yet heard one that would sway me into buying it over a comparably priced A/AB amp. That said, there are advantages in weight and size of most Class Ds. But they seem to lack the weight of the bass and they sound rolled off in the highs to me. In all fairness it could have been the amps I have heard (none above the$6K price point). But I am still not convinced.
And as a side note, I have a close friend that has an incredible system with Sound Lab A1 speakers with a home-made tube pre-amp and Jeff Rowland amps & DAC. He has personally known Mr. Rowland since at least the 1980s when Jeff was just doing electronic repairs and started developing his own amplifiers and formed Rowland Research. I remember my friend telling me about the excitement Rowland had about the "new" ICE module that was the beginning of the Class D era. That was over twenty years ago. After trying to make the Class D amps, Rowland eventually gave up and abandoned the technology as he could never get fully satisfied with the end result; he could not get the sound to be up to his high standards. Today, if you look at the brands offering Class D, it seems to be many of the mass marketing manufacturers, because they can be made affordably. Now of course there may be exceptions to that, with some specialized boutique firms still trying to make it work. I think that speaks for itself: the sound of Class D is still evolving, but when a well respected high end amplifier engineer leaves it aside, I will too.
