Best 6NS7 Preamp for a Pass Labs XA25 amp

It depends on your price range and what sound quality you want.  Not to insult anyone but to me the Rogue is OK sounding - basic design cheap parts - Cary a slight step above - the Aric looks like a bang for the buck design.

If you are looking for something that is reference quality - point to point wired - custom transformers - V-Caps - Shinkoh resistors - Khozmo Acoustics volume control - toroidal transformer in separate chassis, tube regulation - tube rectification, etc.  then send a message to me.

Happy Listening.

Don Sachs makes a excellent 6 sn7 pre 
with premium parts options for around $3500 which is a very good deal 
with a Khozmo   Shunt resistor ladder 
attenuator which cost over $400 with remote it’s a true bargain  for this grade of quality.

There is a two month old Sach's preamp on US Audiomart now.

https://www.usaudiomart.com/details/649598091-don-sachs-line-stage-pre/

deHavilland ultraverve 3

Great, thank you all very much. Just what I am looking for.
One advantage of buying a product marketed for 3 years now.
ARIC 1,650
DON 2,650
DEHAVI 2,995
SUPRATEK 2,300

I heard from a guy with the xa25 who has both the supra
and a s.s. diy kit designed by wayne coburn. cost 200 for parts.
He likes the clarity of the ss more, 
I may do the diy for now and when i miss the remote
too much, buy a solution model.