I am an original owner of the C2200, which is similar to the C2300, and I have used various tubes over the years. The C2200 uses four 12AX7 and four 12AT7 tubes. I don't use the phono stage.
I just recently contacted Brent Jessee (who is well respected on these forums) asking his advice for tubes for this preamp. He was very prompt in his reply to my email. I will be ordering from him this week.
I suggest that you email him with your question. His website is loaded with information as well: https://www.audiotubes.com