Sergio: What class D amplifiers were being used? With my NAD33 (including full Dirac Live room correction), Monitor Audio Gold 100 bookshelfs, and SVS subwoofer, I have found my sound quality clearly better than my friend’s slightly less expensive CD setup without room correction. Clearly not an exhaustive comparison, but dollar for dollar it’s certainly better, and without having to purchase any CDs, less expensive in the long run.