Nice set up! Kevin at Upscale love the PrimaLuma gear.
Funny, sitting here listening to Bruce Springsteen’s new release Tracks II: The Lost Albums through my little Dennis Had Inspire KT-88 with a pair of St Pete SED EL 34s after rolled out a pair of Winged C 6550s. Agree the NOS St Pete Svetlana’s are the best! Have NOS testing RFTs, Teslas (second place), GE and Sovtek 6CA7s, and GL KT-77s. The GLs are very balanced, clean, almost clinical sounding and probably the best new production EL-34 out there, although I haven’t heard the New Sensor Mullard reproduction. I have a pair of Psvane Horizon 300b that Utube reviewers rave about, I found them, well meh in another amp. GL 300BX way better.
I’ve never heard the NOS Mullards that people rave about, but I found the famous Mullard 12AX7 very “mushy” in yet another tube amp I own. Telefunken, Amperex, RCA and Raytheon black plate way nicer IMO.
The St Pete EL 34s are very special, so where does that leave you? Scouring eBay, Reverb, USAudioMart and other sites buying and hoarding as may Svet El-34s as you can get your hands on! Expensive, time consuming, sometimes hit or miss. Beauty in the eye of the beholder though.