I got that from another AudioGD owner locally. He's got a wolfson based dac (not sure the model) and I was not planning on getting a corresponding amp in the future. The tube buffer would be for feeding speakers or an amp to my Hifimans. I just like the expandablity without needing a splitter.
As for my amp of choice... I plan on ending with the SPL Phonitor or Phonitor2, so the ACSS would not do me any good. At this point I still need to decide between all the great choices for my late January purchase.