If you are looking for new production tubes (cheap) try JJ's E88CC'S (6922's). They are a fairly warm tube and fairly reliable. The EH 6922 is probably between the Sovtek (which is about as 'cool' as they get) and the JJ tone wise.
I like (use) a couple of NOS's the cheapest of which is the EI 6DJ8 (if you can find any), Tesla E88CC's, Amperex Bugleboys , and Seimans 7308's, but high quaility new, unused versions, are hard to get, expensive, and as John sez, for you they may not be 'best'.
I like (use) a couple of NOS's the cheapest of which is the EI 6DJ8 (if you can find any), Tesla E88CC's, Amperex Bugleboys , and Seimans 7308's, but high quaility new, unused versions, are hard to get, expensive, and as John sez, for you they may not be 'best'.