Nice system.
Looks like there are opportunities for repositioning… but I am sure that is your plan.
I have been into vinyl for over 50 years. I would stick with your TT now. The Phonostage is critical. I would look at Audio Research, Conrad Johnson, VAC, and Presto. Absolutely get tubes. They will not be a problem and will bring out the strength of vinyl. I am a ARC fan. And have owned and compared them for decades… highly detailed with great midrange bloom and bass.
My general rule of thumb is put equal investment into the amp, preamp, TT/arm, DAC, and phono stage. This gives you some feel for what is needed. Today, you should be able to get better sound from vinyl than digital in the $10K - $20K system… then about equal further on until the high end where vinyl jumps ahead again. Poorly chosen components… the rule doesn’t work.
Of course you could just invest in digital and increase the sound quality of your existing system.