Best Balanced Tube Preamplifier


I want to know your opinion about the best balanced tube preamplifier with real tubey sound.
I need balanced inputs and outputs and I´m loocking for tubey sound, not tube preamp. with ss sound.
Some options could be:
Audio Research Ref. 3
Sonic Frontiers Line 3SE+
BAT BK51SE
Unfortunally I can´t compare them so I need your opinion about them or others.
Thanks.
elduende14
FWIW we've built only balanced tube preamps. As far as we can tell, we are the first manufacturer to make fully differential and balanced all-tube preamps (1989). One of the founders of BAT bought one of the first production MP-1s before BAT was created.
I have decided to hold on to both amps I have now, are there balanced preamps that will work with various amps, ss and tube?
Pedrillo, I would expect that any balanced preamp, tube or solid state, should drive any balanced power amp made. I would not worry about that!
A week ago, Joule-Electra announced its new flagship, fully balanced line stage LA-450ME.

Its the balanced tween of LA-300ME which many (I, for example ;--) consider to be the best preamplifier in the world.

Next, "I need balanced inputs and outputs... " does not imply to me that you need to pay for fully balanced preamp or even for preamp with balanced inputs/outputs. With recently introduced spectacular CLEAR XLR/RCA adaptors from Cardas - you can use any single ended preamp you like. They are REALLY clear!!!!!!!!!!!!!!!!

All The Best
Rafael
My vote is for the Modwright 36.5. If you haven't tried one you are missing out. BAT, CAT, what ever, I've demoed them all in my current set-up and I chose the Modright, it's really an amazing preamp.