Pass XP12 or Kaitaki for Plinius SA 103

Hello,

I'm thinking about adding preamp to my setup.  Narrowed scope to Pass Labs XP12 or Plinius Kaitaki. 

Does anyone have experience with both of those preamps ?  Would be thankfull for your opinion.

Rest of the system: 

Auralic Aries G1
Chord TT2 ( now serving as DAC and Preamp, going straight into power amp)
Plinius SA 103
Harbeth SHL5+XD