Efficient speaker: Zu, Tekton, Volti, Klipsch, Fleetwood?

Tannoy Kingdom Royal MkII

4-way bass reflex, 8 ohm, freq. response 24Hz - 61 kHz (-6dB), sensitivity 96 dB for 2.83 volt at 1 metre, 90 deg conical dispersion. 

$40,000.00 each from Stereoland, Bloomington, MN

I think the titanium driven mid horn in Heresy III sounds better than the new poly driven and much simpler mid horn (the convoluted deep throated mid loading Heresy III horn is a very different design relative to the simple short throat IVs) in the heresy IVs. That said, best 1500 bucks I’ve ever spent (open box or something non sequential serial numbers new a few years ago Capitol Records 75th anniversary version). Clean and clear alleged 99db masterpieces I’ll likely never get rid of. 2 REL subs flesh out the lows...do they sound better than some of the far more costly options noted here? Meh...just don’t care...most other new efficient speakers are either ugly, expensive, or both.

I never heard any of them but if you randomly reorder the list, I can tell you that #2 and #4 are terrible. 

vladtheimpala but then I couldn't afford to move in to my new house.

I've heard Volti's at shows a number of times and was consistently impressed -it's a great horn speaker, really a better Klipsch.  I've also heard Tekton's a number of times and was impressed from a price/performance perspective, but I don't think they are comparable to others on the list.  

I recently enjoyed a great demo of the new upgraded Fleetwood DeVille at OMA's showroom and was truly impressed -this is a great speaker with phenomenal bass for the size, terrific efficiency, a wonderful soundstage, and gorgeous cabinetry.  That would likely be my pick from this list.