What I'm trying to understand is why anyone would get the full mods? Is it to have the option to use either (or both?) the upgraded analog outputs or the upgraded digital outputs?
I think that's precisely why folks do it. It's why I did it.
Even after having lived w/ the analog outs connected directly to my amps for over a year, I occasionally got the itch to see if the latest 'hot ticket' DAC would give me something I didn't know I was missing. Nothing I tried bettered what I was hearing, but it was nice to know it wasn't because the digital section hadn't been modified.
Wayne may have a better answer from a technical perspective, but that's my take.
-Jim