Re: Best Current Production 6L6?
Tesla's, Svetlanas, and GT 6L6GE's are readily available at decent prices nowadays.
Did you notice that after the cold war ended tubes were the ONLY thing that got cheaper?
My first choice for 6L6's are Svetlana.  Good prices, big fat tone, durable, and are contructed very tightly.  I've come across other tubes that rattle internally when cranked in a big vibrating amp.