OK, so before I take off for Friday night dinner, if you're talking about 12AX7's, I'd go with the vintage Sylvania 1961, great price, great tube, great sound. I've used Red Rubies, Siemens E83CCs( in my Ah! CDP), GE Long Plates (1963).

If you're talking about KT88s I've used Sovtek, Red Ruby, Svetlanas, I like the Svets, all were excellent.

Enjoy the Music. Trust your ears. Laugh at Folks Who Claim to Know it All.