I have had the NAD T758V3 and I swapped over to the Yamaha camp (yes, pre-pro, but still). My experience with NAD has been less than stellar. The first one I received had a very loud hum and buzz through the speakers. This was repaired (not completely eliminated, but better). Some other issues came up and in the end the distributer kindly swooped the unit for me. The new unit also was not completely silent. I was so fedup that I decided to change to something else. So I did a little comparison with a Yamaha and the NAD during the last couple of weeks and the NAD went in for a trade. Dirac in this case is no magic bullet.