@yyzsantabarbara I am also in S.Calif, so listening to the Vimburg's isn't an option yet either. The TAD's would seem to be an option, but also difficult to source for a listen. Plus, I am not sure i would cotton to the hard beryllium tweeter!
This is why I have stayed away from the Magico line and others with 'ringing' dome tweeters. Presumably the Vimburg's wouldn't have this issue, but who knows?