BAT pre with Pass Labs amp



I am considering pairing a BAT VK-51SE with a pair of Pass Labs X600s. No dealers nearby to demo this combination. Anyone have experience with this combination, or something similar? Thanks.
jadew
What speakers are you using, efficiency and load?

I own a 51se. I have listened to the Pass, but own a BAT amp.
I have the 50se and the X350 and the sound is amazing. I really don't think you can go wrong w/ this combo.
I have the VK-30SE and X-250 and they worked fine together. It would not be a weak link in that system.
I also got a Pass X250 and I am thinking of upgrading my pre-amp. Should I get a X2.5 or something from BAT? How would you compare the two?
I also have the VK-50SE & X350 combo, and I find they work very nicely together.