Dusty,
Received my upgraded VDA-2 yesterday and am please to report that the DAC is really improved. Like you said, the noise floor is reduced and linearity is much better. Highs are much clearer with a greater sense of spatial detail to the recording. There also seems to be greater dynamics, attack and decay with the upgrade. I have updated my Epinions review to reflect my findings. Keep up the great work and let's see if there will be more sales in Chile.
Slbenz