Thanks for the follow up, Deuter. Interesting choice.
I recently moved from Bryston BDA-1 to BDA-2, the latter using the AKM 4399. It’s a pretty big improvement IMHO over the BDA-1’s Cirrus DAC chip. Enough so that I am expecting a Topping D90 to be delivered today, which uses the AKM 4499.
TL;DR: I woulda gone with the AK4497 option...