I am specifically looking at the NAD T562 vs the T541i. Will the T562 sound as good on Cd's as the 541 for CD's? Has anyone directly compared the two? Or for that matter, in general with some other brand, would I be giving up sound quality to get a DVD/CD combo vs separates? I know people swear by separate amps and pre amps, I wonder if the same applies for audio sources as well.