Need preamp recommendation

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!

@riffwraith - Congrats on the Backert preamp! You will love it!  Keep us posted on how it plays for you, and your thoughts about it!