Preamp choices:Short list

Here is the info for the Decware Preamp DECWARE Zen Triode Balanced Preamplifier model ZTPRE  or if you want to use a tube preamp for your 5.1 surround you could try the Decware Zen Ultra Preamp.
DECWARE - Audiophile Home Theater 6 channel all tube Preamp model Zen ULTRA,  it is also $2,995.00 

If you want to expand your list the Benchmark LA4 was recently given a glowing review in Stereophile.

Frank Van Alstine was once reputed to say that "balanced is a solution looking for a problem". I'm inclined to believe him.

Prima Luna EVO 400 is fully balanced, highly regarded and worth a look

J.Chip

I have a Rogue rp 7 and really enjoy it    Not a real tubey or mushy sound.  Nice deep layered soundstage ,with just a hint of warmth , Upgrade the stock JJ tubes to a good NOS and you will be in good shape.
I can only compare to a Modwright Anniversery, MicroZotl2.0s, that I owned in the past but a clear 2 steps up the ladder from them. Think there may be a couple for sale right now. 3k seem to be the number on a previously owned unit