barkerpj:
You did not mention a price point for these speakers. The Zu Druids list for $2800 last I checked.
Louis Chochos' Omega line of speakers, there is a forum right here on this board, are offered at a much more attractive price point. Bob Brines can be found by a Google search, he offers hi-eff at a reasonable price point as well.
If you can DIY, I agree w/ Mark, there are all sorts of reasonable costing alternatives. Madisound has an easily constructed kit that also features Fostex hi-eff drivers.
Check out Pi speakers (Google that as well), very good rep, hi-eff speakers that are cost sensitive too.