Thoughts on adding a Super tweeter .

I have posted something like this before,but thought I may ask for follow up input.
I already have a superb tweeter,ruler flat to 25khz(titanium),yet wonder if something like the Townshend(it starts to come in above 20 khz,and goes out to a zillion khz,almost)or Murata(comes in at 15 khz,Too low?, goes to a trillion,just kidding btw,)would add "real world"enhancements to my existing set-up.I have NO problems,with high freq performance,as of now,yet in this hobby,one can always be surprised.
Any thoughts would be most appreciated!

Best!