Pass XP-10 vs. Conrad Johnson ET3-SE

I just bought XA 30.5 Amp N XP 20 preamp did not set up yet,
but they will match both being Pass. I have heard people on
hear talking about matching there pass amp with Conrad Johnson preamps including the ET3-SE...i understand this i myself recently matched a Parasound Halo A21 PowerAmp with a
Modwrigh LS100 Preamp on my Martin Logan Speakers with KimberKable n it sounded great...But my thinking with the Pass XA30.5 Class A PowerAmp...it will sound nice n Warm n
smooth on its own...it should not need tube preamp to warm it up...so i went went with pass XP20 Preamp...feel it will
sound real good on my Martin Logan Theos speakers...Remember
Class A sound is like tube in many ways...

I would go with the xp-10 for system synergy reasons but either one will sound fantastic. And you can take advantage of the XLR connectors with the Pass.

thanks all.

Would be excellent to hear from people who have heard both of these in the same system. Perhaps I should have added Parasound Halo JC2 preamp to the mix since it is priced between the CJ and Pass.