Tube preamp for pass labs ?


I recently bought a brand new Pass Labs x250.8. It seems to be finally broke in after about 800 hours. I’m using a good preamp, the BAT VK-33se. I’m curious what other tube preamps others are using with this amp? 
one thing I did was bought inexpensive Wireworld stratus power cables on Sale for $116 shipped brand new for amp, preamp, dac, and server. They seem to have helped settle my system down quite a bit. I really like these inexpensive cords. 
but, again what tube preamps are you owners of the 250.8 using?

TIA for any info given. 
Starboard

starboard

Another fan of Aric Audio and Pass Labs.  I used the Aric Motherlode XL with my Pass X260.8 and XA60.8 amps.  I loved the sound so much that I now use Aric tube amps as well. Great build quality, sound, and customer service.

And one more nomination for Aric Audio. I have his Motherlode II paired with a First Watt J2. In my secondary system I have an older Aric Audio Unlimited paired with a First Watt F5. Both systems put a smile on my ears day after day.  Aric is really great to work with. 

@mesch 

The motherlode XL and Custom 300B Pset

My plan is to have the motherland go to both the 300B and my Luxman M10X.

At least until I decide the M10X is not needed.😁