Install is this weekend. Only testing so far has been free air, but I'll be sure to review them once properly in place. Tweeters will be getting moved around for quite some time until I can find a sweet spot.
polk mm tweeters are more laid back than the ID's. JBL tweeters are sharper than the Polk mm's. Polks may still be better suited for your ears because those highly accurate tweets will be similar to the kappas.