Budget preamp recommendation...besides Schiit.

Depending on what you consider budget, the LTA MicroZOTL MZ2 is an amazing bargain.

Rogue RP1 is very good. Build quality, sound, responds extremely well to tube rolling and cable changes. As an added bonus, it sports a very good Phono stage. 

Dont hate on it but Emotiva XSP-1 Gen 2, excellent fully differential balanced 2 channel pre-amp, read the reviews, if you can find one, it seriously replaced my Krell KAV 250p, and no it is not a home theatre preamp, the soundstage actually blew me and a couple of listening buddies away, we went into it thinking how everyone else thinks about Emotiva equipment, but the proof was in the puddin as they say✌️🎶, excellent mc/mm phono stage also.

Townshend Allegri+
I got one new directly from Townshend for cheaper than advertised. 
 

I concur with all the reviews already written about this preamp. 
 

https://the-ear.net/review-hardware/townshend-allegri-passive-preamplifier/
 

https://www.theaudiophileworld.net/2018/05/the-townshend-allegri-real-world-review.html?m=1
 

https://www.hifipig.com/townshend-allegri-passive-preamplifier/

Nelson Pass Nutube Korg B1.

Such a lot on offer for such a little outlay.