If anyone had any doubts about the current state of technology for Class D amps, I think it should be clear that the technology is mature now. ATI has started building Class D amps. Interestingly, they chose to use a linear PS! I very much agree with that design decision, but you don't see it on most Class D amps. http://www.soundandvision.com/content/ati-at527nc-and-at524nc-amplifiers-review#GGmqEfmDtUR1DGW1.97