NOS tubes preference?
I am in the proces of replacing all of the tubes in my PRRI with NOS ones. So far I have 3 Amperex 12ax7's and one 12at7 installed. I am very happy with the result so far, and I am on the lookout for the remaining 6v6's and the 5AR4. Does anybody have "brand favorites" for certain tube positions?

Comments
For the 6v6´s I recommend the TAD tubes.
Saludos!
JIG
For NOS, if you have the cash look for a matched set of Brimar 6V6. Other favorites are NOS Blackplate RCA & GE. For 12AX7 I like RCA's, Mullard, Amperex, Telefunken (in the right amp). You can get a lot of these tubes rebranded for less money if you know what you are looking for. Hammond, National and other companies rebranded a lot of tubes with their name on them.
and JIG!