No one has mentioned the Kharma MP150s which (admittedly awhile ago) won Absolute Sounds shoot out of class D amps. I have a tubed Cd player with volume control (EAR Acute) driving the Kharmas directly. It is absolutely wonderful sound -- the best I have been able to produce in my system in over fifteen years of effort. I also very much liked a number of the Bel Canto amps previously mentioned. I have had better results with system building using Class D than any other kind of amps, and I have tried quite a few including some pricey ones.