I have Keilidhs and a pair of self-made Kabers both with the 3-bar ceramic dome tweeter. (I made the kabers from parts that were leftover from other's upgrades using MDF - they look a bit like the audio physic Tempo3's) I have heard the Ninkas with the new tweeter but I'm not sure if it is an improvement or just a different type of sound. It certainly has more sparkle, but the ceramic tweeter has a smoothness that I'm not sure I would be able to live without. Have you made the switch yet?
By the way, looks like some nice work your firm is doing. Coincidentally I'm an architect (intern) as well. I'm from Vancouver, worked in Boston and will be moving to Seattle in the next year or so.
Only thing I'm not so sure about on the web-page is the reference to Macdonalds - "full meal deal" - though it's kind of funny in an ironic sort of way.