300B tube recommendation for SET amp?

Unfortunately, Dogpile, the old, 1970s and earlier, WE300Bs are still the clear winners. I have not tried the 2005 production yet, but the 1995 and 96 production was sadly inferior. I also have yet to try the recent KRs. Of the remainder I found the TJs and Sophias okay.

I'd try the KR balloons. I have a pair coming for my Wavelengths. I'm using the Sophia Princess 300B in them right now and they sound very good as well.

Hey gang, so far it's a mixed bag with individual favourites. Maybe I'll just experiment with a cheaper quad like the Valve Art and work my way up if necessary. Thanks for all your input!

Dogpile, you might want to consult Thorsten Loesch'scomparison, another comparison by an audio mag (worldaudiodesign) hereand finally, an overview by enjoythemusic here.
Cheers

I'm surprised no one has asked you what your personal sonic preference is. People here probably don't have extensive experience with a range of 300Bs, so they're just offering you suggestions based on what they are using.