Looking for opinions on the best 12AX7 for what I want. 1. Must be readily available and affordable. No expensive NOS unobtainium need apply. GT, EHX, JJ, etc. etc. Run of the mill stuff. 2. Looking for late breakup. Not crazy gainy. Would even consider 12AT7 etc if it doesn’t make the amp lose any volume. I don’t have any volume to spare. 3. Maybe one you think is a little dark sounding? Amp also has treble/presence to spare so something mellower would be plenty ok with me. Certainly don’t need anything particularly zingy and bright. Go! And Thank you.