Which Tweeter preferred- dome natural material, Beryllium/Metal or Planar Ribbon? Why?

Custom satellite grade carbon fiber dome integrated into bespoke Scanspeak frame / motor matched to .25 db the pair, had tuned w filter network in anechoic chamber to match the reference. No breakup modes from midrange filter and 30 kHz.

I enjoyed my Seas tweeters in my audio physic speakers.  After a move to a basement system instead of a joist supported floor, went to Martin logan montis.  I found the hi frequencies detailed without fatigue, yet missed the air movements produced by conventional drivers.  Present pleasure is compression horn in Fyne audio.    Still have the ml in ht

Got beat to the punch, but agree carbon fiber is the way to go. ;-)

Musadd- Funny  you should land on the sealed planar ribbon tweeters 

as your flavor. I find the Borresen speakers to be the best sound I've

heard- and by a pretty good margin. 

Danger-Danger!- Nelson Pass loves to tell the story about his Plasma

speakers which nearly killed him. 

Arguably two of the best German speaker manufacturers, FinkTeam and Wolf von Langa, employ custom Mundorf AMT tweeters, and they sound fantastic.