Re: are electro harmonix tubes any good?
My experience with EHs come from 6l6s and 12ax7s only. IMHO: they sound really good when test playing, it´s all there, bass, mids, treble, pinch harmonics. Compare them with other brands; they are best. But, for some reason, I don´t like them when playing with a band. Sometimes they sound harsh, or simply "not to my liking". Can´t explain why, really.
Today I use SEDs 6l6s in the power section, and different 12ax7s in the preamp. GE, Sovtek 12ax7 LPS, JJ ECC83, and so on. The preamp tubes are not so expensive; one can buy some different brands and test back and forth, until one find what fits for the amp/guitar/pedals and taste.