Best tube preamplifier for under $15k

I should add, the two that interest me right now are:

Linear Tube Audio MicroZOTL
Vac Renaissance V w/ phono

Seeing what other options to research

The VAC Ren MKV is fantastic and it's the one I use in my main rig right now.  Got mine used (w/o phono) for $5K.  I've read a number of others, including dealers, that you have to move up a significant amount to the Master ($27K) to get a meaningful improvement up the line.  The MKV borrows much of it's DNA from the Statement.  Great value here IMO.

Hi Keith,

I think the "best" will depend on your amplifier and preferences (sonic, aesthetic, and ergonomic), but these came to mind in ignorance of those preferences (in alphabetical order):

Audio Note UK (Whichever model is within budget. They have many models...)
Lamm Industries LL2.1 Deluxe (especially with NOS tubes)
New Audio Frontiers Amati
Thomas Mayer 10Y
Thoress
VAC Renaissance Mk V

I haven't heard the Atma-Sphere MP1 outside of show conditions and can't comment but some people seem to enjoy it.

disclaimer: I sell Lamm and NAF
https://gestalt.audio

Eastern Electric Minimax Phono - $1000

Zesto Leto Ultra.