I have a OG with the V.2 analog cards and Unison USB I upgraded myself, when I found out about the upgrade program I thought cool, I'll get the latest and greatest chips in my unit.
When I took it into the Schittr they guys there said that mine is the best sounding, better than the new versions, and no need to upgrade the DAC chip, so I just paid for the chassis upgrade which was well worth it since it's smaller, I changed from silver to black, and I have the remote control now which really helps.