Best Kept Speaker Secret?


OK all you speaker experts out there here goes. There are always "sleepers" or "exceptions to every rule or cost" in high end audio equipment. In your opinion what is the best kept secret or exception to the cost for the very best speaker you can buy for $4000 or less (Used). Your feedback will be greatly appreciated toward building my short list. Thank you.
golfnut
As a former 10T owner for 5 years,I submit the Montana ESP.--Near the price range.
I'd invest what is left in a pair of Titan II LEs or there newly introduced sub. Wonderfully musical and dynamic!
Aerial 10T's without a doubt. I bought a used mint pair with the Santos Rosewood finish for about the price you are contemplating. Fit 'n finish are second to none. Wouldn't trade 'em for, well, most anything. You connect them to the right amp and you won't be lacking for anything. Slightly sweet sound with a powerful, taught bottom end down to about 23 Hz.

But they love as much power as you can throw at them. If your amp is less than 150 or 175 wpc into 8ohm and you have no intention of upgrading the amp, then you might want a more efficient speaker. The 10T's are rated at 86 db sensitivity at 4 ohm.

-John
I have to agree with fizgig, the Silverline Sonata's are superb from top to bottom. All the speakers mentioned here are very good and I've heard most of them but the silverline just disappear and let you hear the music.