Check out ModWright. Used to own an earlier version of the SWL 9.0 and felt it bettered ARC’s at least up to the LS25 MK II. It’s a great preamp that has killer PRaT. Not a fat tube sound, but very musical and very open. I felt the ARC’s felt cold and lean compared to the little ModWright. Here’s the current model.
https://www.audiogon.com/listings/lisa79ah-modwright-swl-9-0-anniversary-tube
https://www.audiogon.com/listings/lisa79ah-modwright-swl-9-0-anniversary-tube