Best 6NS7 Preamp for a Pass Labs XA25 amp

Don Sachs 6SN7 Line Stage...  you can't do better and only <$2k.  Perfect pairing with the XA25.

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