Seas Excel Diamond tweeter or Plasma?

Interested in building a speaker using, I think, the most expensive “conventional” tweeter available at $6k a pair for the Seas Diamond. I only want to use the best drivers available. TAD 15” woofer, ATC dome midrange and a great tweeter.
I well appreciate the art/science of speaker design working with an established Speaker designer.
Surely the enclosure and crossovers are critical. I lean toward the Diamond but not sure if the Plasma is better.