Stay away from tubes, people that are tube followers were all ( me included till I learned. ) deceived by the corrupted AHEE where all of us are members too.
This is the preamp to go:
https://www.vincent-tac.de/en/product-types/preamplifiers/sa-94.html
Change your cartridge for :
https://www.hanacartridges.com/products/hana-umami-red
and next year your speakers. All these system up-grades will improve severely your today quality level performance and when you buy the new speakers these up-graded system not only will shines but you have to up-grade nothing else but maybe to check the treatment room/system and maybe too a second subwoofer.
Regards and enjoy the MUSIC NOT DISTORTIONS,
R.