@gabriel123 What an excellent idea! This is the way I went for quite a while, pairing a tube preamp with a solid state amp. I even paired mine with an amp a lot like your Coda, one of its’ technical predecessors - an Innersound Electrostatic amplifier, designed by Roger Sanders. Whenever it needed service I sent it to the guy that runs Coda. The Coda amps kind of fly under the radar, but they are incredible - well built, superb sounding, wonderfully performance-transparent. I think the Coda amps are some of the best built and best sounding power amps out there, for solid state. The iron fist in the velvet glove.
So, you’ve already received many excellent recommendations on the tube preamps. There are many you would be very happy with. But before you make your decision, however, I encourage you to scroll up to the top of this Forum and check out the "Popular All-Time" threads. You’ll find one called "Preamp Deal of the Century". That thread lasted well over 20 years and has over 26 million views. That’s pretty incredible.
That thread is all about Supratek preamps. Custom built in Western Australia. They are wonderfully built, all point to point wired, sound superb, and are just are very solid performers. Oh, and they have a lifetime guarantee.
I’m think you’ll be happy with whatever you choose. There are many, many excellent sounding tube preamps out there and many have been mentioned on this thread.
Best regards and best of luck,
Markus(used to be the naimnut)