I think you overlooked one James...
Page 77 - Bryston BDA-1 DAC - Class K
Class K is "Keep your eye on this product. Class K is for components that we have not reviewed (or have not finished testing), but that we have reason to believe may be excellent performers..."
If I'm correct, they've had a BDA-1 for a while, but haven't published the review yet?
If the BCD-1 is Class A, I can't imagine the BDA-1 not also being Class A.