Most experts agree that the perfection of Class D is a thing of the future (by true "high-end" definition/standards). With that said, I am very satisfied with the performance of the PS Audio GCC-250. It is VERY quit and to my ears is a definite improvement (although very subtle) in performance over my old AR-D240 (which was never an exceptional amp, but certainly not a bad sounding solid state either). With the GCC-250, bass is more controlled and there seems to be a bit less harshness in the highs. Additionally, there is a good bit of power on reserve for demanding musical passages. I like my music loud and I lean toward the classic rock, contemporary blues/jazz side of the spectrum and the GCC-250 does well with this genre. I do appreciate female vocals and acoustic guitar, which the GCC-250 also does a respectable job of reproducing. Bottom line: If you're looking for that true high-end experience stick with class A, class A/B (for now). However, the class D of today is pretty remarkable and there are some great amps available on the current market. While I have not compared many class D amps, I am very satisfied with what PS Audio has come up with in the form of the GCC-250. Note too that the GCC-100 has attained some very positive reviews.
Ben
Ben