Need preamp recommendation

I traded in my LTA preamp for Pass XP-20 and haven’t looked back. The Pass has much better body, spatial separation, and detail with significantly lower self-noise IMHO.

Get a loaded Sachs preamp for under $3k. One of the great deals in audio. 

Might add Odyssey Audio to the list ...

I second the Pass XP 20.  Use the best interconnect and power cable  you can afford 

I will provide two recommendations based on my own personal experience:
Backert Rhumba - if you are looking for a very fast, neutral sound, with a holographic soundstage, super low output impedance
Aric Audio Special 6SN7 - if you want a fuller, more rounded sound (including rounder bass), also with a huge atmospheric, holographic soundstage.
Love both, easy to live with either, and match well with SS and tubes amps.  Customizable sound based on the tubes of your choosing / both are tube rolling pleasures!