I now have 2 high gain JJ ecc83s for v1 and v2 of my c30 and I now have a sovtek 12ax7 LPS for v3.I read lots on that tube and it seems like a popular one for phase inverter on the c30. I watched lots of demos of the sovtek and asked lots of questions. There's a few tubes I want to try yet. Such as preferred series 12ax7. For speaker I am ordering an eminence governor. Great sounding speaker with strong mids. I will easily be able to cut through the mix. To be honest my classic 30s stock speaker blue marvel has been worked in now since I bought it new a year and a half ago it has nice bottom ends and strong mids. Just a little too harsh high end. The governor will smooth out the high end I think. I will record a demo of all this when I get the speaker installed.