Looking for a tube preamp with remote control.

I was going to suggest the Prima Luna EVO 200 but I don’t think it has a phono input. I believe on some models a phono input can be added on but I’m not sure of the EVO 200. It does come in under your budget and may be slightly over if they can add the phono input. A dual mono design, you’re getting a lot of value for the money.

On the other hand you could go vintage. I’m running a DYNA PAS-3X with vintage Mullard 12ax7’s. There are two phono inputs which is nice if you have a stereo and mono table. I’ve found it to be quite adequate. Very affordable. I’ve seen them go for $500-$1500 based on recapping and mods. Although no remote with this one which may disqualify it from your consideration.

The Don Sachs preamp is outstanding. I’ve had mine for nearly a year and it’s really tremendous.

My first choice would be Atma Sphere MP-3. Exceptionnal tube preamp, made in USA. It replaced my Ear Yoshino 912 which is also one of the very best tube preamps available on the market today.

I love my Cary SLP-05 tube preamp. It is built like a tank.  It has full remote. 

Love my Quicksilver. It's not as pricy as some of the other very good suggestions here (Sachs, Atmasphere) but this would be a low-cost experiment: https://www.usaudiomart.com/details/649756290-quicksilver-remote-linestage-dj8/

You could probably offer $600 and then buy some really nice tubes to roll in and out, as well as a good power cord.