Pure tube phono preamp

check out allnic.

The Ear Yoshino 324 and the Wavac LCR-X2: natural sound!!
Préamps with phono stage: Metronome C6, Ear Yoshino 868 and 912.
Wavac PRT-1: best I ever heard.

Find a used Lamm LP2.1. I've listened to dozens of phono preamps and that fits your budget and is quiet and handles low output MCs. Also sounds better than anything else I've heard.

That’s an easy one!! The Tavish design Adagio can be had @ $1999...in your choice of finishes, as well as available with your choice of improved power supplies. I cannot think of a better equipped all tube phono stage available at the price...plus, you will not have to buy a seperate step up transformer, as Mark has built then into the device. He uses a pair of high quality jensen transformers contained within the preamp chassis. I own and use the lower priced tavish the classic and love it. I use it in conjunction with an outboard jensen step up trans....I am currently tube rolling with a nos GE jan 5751, RCA 7025 black plate (12ax7a), and a GE jan 12au7.

You will need to get on a waiting list, as they are built to order and are currently all sold out of all models. 
https://tavishdesign.com/

in the price range you are looking at, you really should consider the VTL TP 6.5. Used, they go for well under your top budget. They use an FET for the first gain stage at the MC level, but after that all valve. Its the most open, most dynamic phono stage I have heard, and have been through over 30 of them in the last 4 yrs.