I have owned a few NAD components and a BBE sonic maximizer (many many years ago). IMHO-you would get better sound w/o the BBE in the loop. The straighter the signal path, the better. Also, given enuff time the sonic max gets fatiging and distorts the signal thru equalization. If it were my choice, I would go with the Cambridge-its a newer design and the NAD is acting up so its more reliable.