I have heard that the newer NAD all-in-one is a fair bit better than the old.
Even the Panasonic's (Tripath amps) get pretty good words, though, as long as the speakers are not a hard load (6-8 ohms best). I have their DVD-S47 DVD player feeding a XR-25 receiver via digital connection, actually very musical for a cheap system. I imagie their all-in-one is good as well.
Good luck!