I have used a number of different brand EL34s, JJs, SED Winged and other current production as well as old stock Tele and Mullards.
In the end, I like Gold Lion KT77s purchased through Upscale Audio for their reliability and they sound very good.
Mullard EL34 that sounds best
Will need a matched quad of EL34 for the VAC Avatar SE integrated at some point. Currently using Svetlana SEDs but I guess Mullard should be better.
What particular Mullard would you recommend and why ?
I use Mullard 12AX7 longplates in preamp and RCA blackplates as driver tubes.