I always get tubes from Audio Research. They test them thoroughly and I like to support them. The audio research sound is carefully tailored and i is the sound I would choose. Inexpensive stuff, I would tube roll. Alternatively you can typically get original equipment tubes from The Tube Store (they also recommend “better” tubes) and Upscale.
If you have the funds you might check out a ARC PH8. I had one for many years… an outstanding phono stage. While I moved on to a REF 3… the PH8 was a bargain.