So I spent last night listening to the BHA-1/HD800 combo after a conversation with another forum member. It occurred to me that I've never really given this pairing a fair shake, since I've always recently had a tube amp that was ostensibly "for" the HD800.
Well, I must say that the BHA-1 drives the HD800 extremely well. Some recordings were harsher the treble than with the Super 7/HD800 combo (which itself is not overly lush or lacking in transparency), but on the whole I found the pairing quite respectable.
The ole flip / flop I see..