Yes, I auditioned a Jolida 302B with both the stock and Svetlana tubes and the Svet's sounded very good to me (warm and full). The only other EL34's that I have ever owned/used have been Mullard XF1's and 2's, though in different/vintage amps so a comparsison would not be valid. The Svet's, again, sounded very sweet and 3D. I do have NOS Mullards on hand in the event that I ever own such an amp again, but still would not hesitate to try the Svet's as well, based on what I heard.
Your choice of EL34's
I would like to hear from some EL34 owners who have a favorite output tube. Your input will give me food for thought and possibly concur with my findings on some of the tubes I have heard. BTW does the Ei fatboy really put out more pwr as I have heard advistised? My thanks to all.