In general i like the nad sound period. I have the home theater amplifier - the nad t778 - it has had issues with shutting down randomly and going into protection mode - i have had it worked on about 3 times - shipping it to a service center to get fixed - etc.
i keep wanting to freak out - but i keep giving it the benefit of the doubt, because the sound quality is so very good - its amazing the things we are willing to do - in the name of good sound quality