Best tube preamplifier for under $15k

EAR 912

I came from a ARC Ref 1 and the EAR is a better sounding unit in my system, to my ears. 
A stunningly good piece of gear. Tone, texture, soundstage and PRaT are spot on. I have it driving an Einstein The Power Amp. Great combination. 
I listen to Jazz, Rock, Classical, Pop, Bluegrass, Ambient...

I'm envious @ewert. I have to get by with the 912's little brother, the 868L. Good enough for my modest system. ;-)

Lots of MicroZOTL fans - very interesting.

They're the current flavor of the month.

++1 Don Sachs pre amp. Simply amazing, and Don will tailor the output to your amp if you need.

@bdp24 I have the EAR 868 in my second system driving a Luxman M700u. It’s a great preamp too! Sweet phono stage in that unit.