I have two renegades. One came stock with all sovtek 12ax7 wa's, Ruby el34 bht, sovtek 5881 wxt. The other came with tung sols in the first two slots and sovtek in the others. Power tubes were ruby bht and ruby 6l6gc? To get a good compare I put sovtek 5881 wxt's in that amp. The tung sols are smoother, warmer, and a little more even across the spectrum. The wa's have more lows, low mids, and a little more fizz on top. The wa's seem a little punchier. I've tried a bunch of different combos. Tung sol in v1, chinese in v2-v5, and a sovtek lps in pi. These sound great as well and makes the amp more refined, smoother, warmer. In the end, there's really nothing wrong with the original stock wa's and at times I like them best. Granted I play through fairly warm cabs. Bogner OS 2x12's. One with Creamback M's and the other with Creamback H and WGS ET65.