I just profiled my Diezel Einstein 50W with 6L6, EL34 and 6550 power tubes just to see how the tubes changed the sound of the amps. I profiled them on Channel 2, Mode 1 and went directly through a Marshal SE100 speaker emulator, so no miking of a traditional cabinet. They are up on the exchange. Take a listen and let me know how they sound!
the three rigs are
Einstein 6L6 SE100
Einstein 6550 SE100
Einstein EL34 SE100