In my review I compared my G08 with its internal DAC to my G08 as a transport into the digital input of the Director. The G08/Director combo won. In a word: apodizing. Although I didn't try it, I would run my MacMini to the Director via USB rather than optical for two reasons: 1) the USB connection is asynchronous so it is less jitter prone, and 2) the optical input in the Director tops out at 96/24. I don't have an MC200 so I can't help you there.

561, DSP5500s, DSP5000C, analog sides and rears