Best high-efficiency speaker under 10K


I have never played in the high-eff speaker / low-powered amp space, but I've read so many things that I would like to give it a try. I own an EAR 859 integrated amplifier, De Paravicini's interpretation of SET. It's pretty incredible, especially if you consider its price tag. I am now in the business of choosing the right speaker. I listen to a lot of jazz and vocals and opera. So, I can do without the sub-40HZ frequency range. I would like to stay between $3K to $7K, certainly below $10K. Here are the options i am considering:

1) Zu Audio Essence.
2) Beauhorn Virtuoso (single driver)
3) KCS louspeakers (the model that uses the SEAS exotic driver)
4) Devore Gibbons 8
5) Living voice Avatar

If I had to choose right now, I'd go with the Beauhorn, but I know their limitations.

Any thoughts/personal experiences with the above or any other speakers in this range? Thanks.
ggavetti
For those interested in listening to Tonian Labs I believe they are scheduled to be at the inaugural California Audio Show in Emeryville (Northern California) from July 30 - Aug 1st. I've heard about Tonian for a long time - looking forward to listening to them.
I was not unfortunately able to hear the more expensive Tonian models. I owned Beauhorns and they are very good, but pretty bandwidth-limited as you said. What they bring is smoothness missing from almost all Lowther speakers. Front-loading the drivers brings up the low-mids to eradicate the peaky mid-high mids.


You better look for the real thing. Real HE no plastic cones.There is a certain minimum point of sensitivity to deliver the nuance & dynamics and it is far beyond the 92dB.

Just for inspiration:
DIY copy of Shindo Altec 604
Lowther America BIG OPEN BAFFLE/Lowther Field Coil/Altec 416 B
Carfrae LBH copy (by creation audio)/Lowther PM7A/Goto SG116TT
Sachiko/Fostex 208 Sigma/T 90 A
(or)
Cardersound MADISON/Fostex 206E/BMS 4540

The above mentioned tweeters are a subject of an added upgrade if you feel the need for. (I do)

George
used Avantgarde Unos should be available in the $10K range. Full range, 103dB sensitivity; but you must be able to sit 12' away in your room.
I would also look at the Tannoy Dual Concentrics (with the pepper pot wave guide). I picked up my used Kensingtons in excellent condition for $4500 earlier this year.