^ It's been discussed in the FI-BA-SS thread that FAD's balanced air movement would be useless for traditional BAs because they are sealed. Therefore these IEMs have to be moving armatures.
And yes, I have already ordered the FI-BA-SB. Dimitri was lightning fast in his communication and a pleasure to deal with. I agree the phones aren't cheap, but AFAIK there are currently no cheap moving armature based IEMs on the market. I absolutely love the FI-BA-SS and if these turn out to sound similarly good they'd be cheap in comparison.
As for comparing notes over tea, it would be more likely over coffee or wine in Vienna, but of course I'd be delighted.