Herby660 is right on. JJ EL84's are great new production tubes. Your money should go into selecting some good pre's.
Cheers ChrisL
I have tried all sorts of EL84's and Teslas are great. The pre amp valves seem to make all the difference.
I have six mullard valves from the 60's which i move around my amps, when I want that special sound. Otherwise Tungsol's are good, best newer tube as seem richer than most other. The JJ preamps just seemed less harmonic to me and colder more sterile when clean. Full blast there is harmonic loss but it is less noticable.