Best tube preamplifier for under $15k

@smodtactical , no problem.. 
I am enjoying the XP12 very much, to the Point of asking what the XP 22 would bring me. you know how it goes, lol.
The preamp is very good as it delivers a very detailed presentation with good accuracy and imaging. It is not quite neutral, leaning to just right of neutral, the Pass sonic house sound.. It will not cover up a bad recording. I’m hearing lots of details, good dynamics.. very quiet background. The imaging is more life sized than I’m used too.. 
Not extra big and airy like my last tubed pre, this is more real. More live. It makes me turn up the volume more because everything just sounds better and more focused. It never asks the question if it’s tubed or solid state. It’s just more real. Never fatiguing or harsh. I’ve heard sweeter on top, but I’m digital front end wise, so it could be better with a good tt. So I have a bunch of NOS tubes collecting dust and it looks like it might stay that way for a good while.

People whose ears I trust swear by the LTA. I have their UL amp and it is simply amazing so I would not be surprised if the LTA is right up there with the best. I recently bought the new Herron VTSP 360 ESP. Fantastic linestage--significantly better than the already great VTSP 3A (RO3) and should be on anyone's list at $6.5K. Both the LTA and Herron are less that half of the OP's price point but I would venture are right up there with others on the list that retail $15K but to be fair I haven't heard them because I can't afford $15K!

So what did the OP choose?

My first suggestion is MP-1 by Atma-Sphere or MP-3 fully loaded.
Second choice would be VAC
Third Choice: Lamm

BAT VK-33 ... 6922 based and you can tube roll to your heart's desire. Wonderful sound, built like a tank, reliable, and won't break the bank.

larryi brought up a very good point,that seemed to go totally ignored. I think there are too many unanswered prerequisites by the op. Otherwise it’s just everyone suggesting what they have.