"Best" 12BH7/A tubes?

What is the sound character of the various 12BH7 and 12BH7 tubes? Different manufacturers, different dates, different construction types... How would you rank them in "quality"?
From my experiences..
From Most neutral to warm.....( in general terms )
All Grey plates except Rca ( black plate )
Ge-Sylvania-Tungsol-Rca grey plate-Rca Black plate....it all depends on what you need..
Ge being the most linear and most detail ( with less body )
and Rca Black plate being most warmth with less detail,but more body and lushness...
I prefer Sylvania ( 60's Pinch plates ) .....Nice deail,but not as dry and stark as the Ge...Many other options but would recommend starting with either RCA grey plates ( usa 60's vintage ) or Sylvania ( 60's vintage )
I just put a pair of NOS Brimar's in my power amp. They replaced a pair of black plate RCA's. I was really surprised at how much better they sounded across the board.
Thanks, Thorman. Pinch plates? What type of getter and lettering? Ditto RCA. You think the Sylvania has the best balance of detail and body?