You seem to like the sound of NAD. I love the sound and picture from my NAD T751 which is a multichanger. It has a digital coax output that I intend to use to connect with a modified ART DI/O. NAD also has the T562 which is the single disc DVD and is supposed to have better specs than my T751... which is not important since I plan on using an external processor.
My main disappointment with the NAD T751 is the slow transport speed... very annoying compared to Panasonic, Toshiba or Sony. The progressive scan image is also excellent.
You would not be doing badly going with an all NAD system and adding an external amp ... NAD or ATI or AKSA ... as you upgrade.