I've been researching tubing changes for a while and now it's a necessity. .. I am looking for a smooth warm tone and I primarily get my higher gain from overdrives or distortions. I was thinking about the Tungsram EL84s with some RCA short black plate 12ax7s ( or possible JJ ECC83)....I'd prefer not to break the bank but would be willing to spend extra if necessary. I don't live near a good music store to try things out, so I basically have to research and then plug things into my signal chain and hope for the best.... Any advice would be appreciated!!