I have the Jolida with internal damping, GE black plate triple mica - and it sounds good. I've tried a few current production tubes: sovtec longplates, EI's, and they sound good too, though slightly different. The Jolida is good, but not a giant killer! We compared it to a Wadia in my audio group, and the Wadia definitely had way better resolution while maintaining musicality and soundstaging. Of course, that costs 7x to 10x more. Without significant mods to a stock Jolida, I don't think you can fix the resolution thing.