Mr Perceptive -

Wow! Thanks for the test. I'm not as electrically adept as yourself, so I am looking at third party options (Red Wine and Bolder).

I did some tests today between a stock SB2 and my Audio Aero, both fed through the G68.

The CDP is better (better dynamics and soundstage), but the difference is not massive (certainly not the $1400 price difference between the two).

I'm going to try a new PSU with the SB2. If that comes clser to the CDP, I may go the whole hog and get the SB2 modded by Bolder or Red Wine.