Gold Lion KT77 are incredible tubes if you get then selected for the bias of your amp. I have a quad I use in my Mark V, they are pricey though and nearly cost as much as SED =C= EL34's. SED =C= EL34 were tops in my RA100 but supply is limited due to out of production.
I decided to buy my last set and hope they perform as good as the one's I have now. (beware that there are many places selling 2nd quality for the same price) Also note: SED EL34 tubes use a larger glass bottle (actually same size as the GL KT77), larger than typical EL34 but smaller than a 6L6.
I have heard good things about the Tung Sol el34B but have not tried them myself. Not yet anyway.
Ruby EL34BHT will sound similar to a 6L6GC. I have a quad that I tried out in my RA100, not bad but not great either (just does not compare to the SED =C=.) However, I may give them a shot in the Roadster since the overall tone of that amp is quite different than the Mark V or RA100.
I have tried Tung Sol 7581 (basically used them up in the Mark V but they still in good working order) not an EL34 type but they did sound great in the Roadster. I may consider the Tung Sol EL34B sooner or later.
From left to right, Ruby EL34B (same diameter of 6L6 tube, also taller), KT77, SED=C=, EH, Mesa.