Tubegroover, your point about break in is well taken. I have only heard them at the shows, and cannot say whether they were properly broken in or not - - they certainly had a little too much zing for me. I'm guessing you must be right about the break in.
I do still have some silk domed de Capo's in my second system, and I admire what they do well - - musical message, like you say, and almost an "electrostatic-like" sense of speed and coherence. Ref 3A's are magical!
My main system sports TAD CR-1's, so I can be cool with beryllium...;-) They certainly needed the time to break in, but once there, oh my!