I had a NAD 777 and was generally pleased. I'm 85% audio to 15% video use. Until it just stopped working and the warranty company could not repair, I was paid out and went in search of next thing. I read many reviews, and selected an Arcam AVR 600. I do use better cables throughout, but at the time kept all the same. The comparison music wise was measurably better with the Arcam to the NAD. Much more quiet, much of that term pleasurable.
Good Luck
Good Luck