Originally Posted by s2silber
Yup... what the Scoop said.
The advantage of the D-Link (& i-Link) over Coax or Toslink (Fiber) is that it will not only transfer DD & DTS signals digitally, but also send SACD - DVD-A digital signals to the rcvr. Then the rcvr can use it's DAC's to convert.
Edit: Chances are that most people will NEVER be able to detect the differences in DAC's... assuming they are relatively good. Other factors (like speakers, room acoustics, etc.) are also important in assessing SQ and often have more impact on the sound than the DAC's. Between your reciever's DAC's and the 3930's DAC's... unless you have a real keen ear, listen to just the right music, have great speakers, etc... chances are you're much better off with the D-Link connection as it adds all the convenience of the receiver with a barely detectable loss in SQ.