Best tube preamplifier for under $15k

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. 

Perhaps an ‘One Careful Lady Driver’ ARC REF40 if one were to drop lucky

Emotive Audio Epifania 
Allnic Audio L-5000 DHT

Both well under the $15k ceiling, both reference class.

@phantom_av  it's great experience to compare different kind of preamplifier. I have the similar interesting in the past few years and just got dehavilland UV iii a  month ago. I have very good impression of this preamplifier. Although it is not expensive, but the sound is great.

Have you listened to  this preamplifier? If yes, how you compared with mp-3 ?