Usher DMD tweeter upgrade: worth it?

I do love people spitting bile about things they know nothing of, breakup at 24khz? I've never heard it and more to the point hifi choice completely disagree with you as do their tests , I believe the correct phrase you are looking for is 'lift' , also B&W diamond tweeters 'breakup' (your words) at 15khz not 50. See review (http://www.hi-fiworld.co.uk/index.php/loudspeakers/65-reviews/511-usher-dancer-mini-two.html)

Now the lies have been dealt , I have owned my BE718DMD for a while now, they are quite simply outstanding speakers , every time I change something in my system, good or bad , these speakers tell me exactly , speakers cables , source , interconnects, I can hear it .

If you like warmth stick with the BE , if you crave detail , soundstage and realism , the DMD is for you.

I see several people saying that this driver can be purchased for less than $200 from Taiwan.  Where can this be bought?  If I am going to experiment, I rather risk $200 than $700.

I live in Taiwan> I just contacted Usher here to replace my old tweeters on my cp-8571   they are not less than 100usd each here. they cost 12000ntd + the exchange of your old tweeters  (aprox 375usd)  also Usher will not sell the dmd tweeter unless it is a replacement

Does anybody who replaced their Usher Be tweeters still have them lying around? I'm looking for a nice used pair. Are these tweeters always the same? Or do they differ, depending on which speaker they were used in? I am going to use them in a pair of Mini Dancer II.  Thank you.

@hukkfinn
Yes.  I have a pair of Be tweeters taken from my Dancer Mini Ones.  They are the exact tweeter used in the original Mini Twos.  I will PM you to discuss farther.