I think it's great that Bryston will modify equipment at a later date. I was surprised that the DAC upgrade would cost no more than what the option originally cost. I expected it would cost quite a bit more. It certainly says a lot for the company!
Right now I've just got the BCD-1 & my trusty TD-160 for sources But I am looking at doing something with streaming and lossless, but I don't know enough yet. So, it seemed reasonable not to go the DAC route at this point.
I just noticed my original subj. was "SAD" option...can't image what I was thinking!