I'm considering a DAC, and i've got a few questions. The first one you may laugh at, and if the answer is "yes" then you don't have to read on to save me further humilation! 1) Do you need a dedicated transport? I have a proper CD player with it's own DAC (Marantz CD7300), and an optical output. Would it be pointless using this with a DAC, or would I need to upgrade to a decicated CD transport as well? 2) If I connect my DVD player to the DAC by coaxial/optical, and then from the DAC to my av amp by coaxial/optical, will I still have 5.1 sound? 3) I have a Marantz PM7200 Stereo Amp. When I connect the DAC to the amp by analogue output, do I need to use the "source direct" button on my amp to avoid the amp changing the signal from the DAC? Also, the PM7200 has a "class a" function. Will I still be using this with the signal from the DAC? What would be the best combination of "source direct" and "class a" with the DAC signal to not have my amp degrade it? Thanks for anyone who answers, and please stop sniggering at the back!