@alfau7 I did end up getting the Pass XA30.8. I am running it with a tube preamp and it is very very musical. I don’t think I will let go of the 30.8 anytime soon.
I prefer the XA30.8 over Moon 330A - more 3D/airy presentation, refined bass and overall more musicality.
I ran the same tube preamp with Moon 330A first. The 330A had too much gain and there was a faint crackling sound through my speakers when music is not being played. With the XA30.8 (26db gain), it is a great match with my tube preamp. Dead quiet!
I would be happy to answer any other questions you may have re: the XA30.8s
I also had the First Watt J2 prior to the XA30.8. Both are excellent amps. J2 is more sweet sounding while the XA30.8 has more defined bass and overall "more of an audiophile amp". I would have been happy with the First Watt J2 if I didnt get my hands on the XA30.8. Again, it would depend on your speakers as you may know.