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
I for one like the Essence. It took me three weeks of playing with toe-in and position from the rear wall, but they sound fantastic in my room. I'm told they suck compared to the Zu Soul Superfly. That may be true.

I can also offer 3 other options. My Triangle Celius esw's were unbelievable in my old house where I had them on a long wall setup in a larger space. They did not sound that great in my new listening space which demanded a near-field setup. Triangle's aren't for everyone, but if it is a good fit you will IMMEDIATELY know. My wife is still angry with me for selling them. BC Acoustique is another manufacturer that horn loads their tweeters.

Also consider WLM La Scala Monitors or floorstanders. Truly an exceptional all-around speaker with the benefit of a level control for the tweeter. I persoanlly like my Zu's better, but the La Scala's were much smoother with less coloration. Audition the La Scala floorstander. I suspect you will end your search there.

Finally, don't overlook the new series of Klipsch La Scala. Sam Tellig bought his review pair.

PMB
I have heard the Devore Gibbon 8s and they are excellent. At the lower end of your price range, I own Omega Super 8 XRS single drivers that can be had for $3500 new. These excel at vocals and small jazz and other instruments. I recently heard the new Horning speakers and must say that they were the best I have heard with SET yet. Outstanding dynamics, effortless sound. I heard the Eufrodite model but the smaller Aristotle version should have similar characteristics and is under 10k.
Phalen, (others) Musical Affairs Grand Crescendo's. We listened to PC music source through a Leben CS-660 integrated 22 watt amplifier, which is really nice itself, and provided more than enough umph! I'm not at all versed in giving reviews, but I can't imagine anyone with complimentary amplifiers etc, not being ultra satisfied with these! The only thing I didn't like about them....they weren't mine!