Luxman vs Pass Labs

 I think that you are comparing apples to oranges. I would look at these two Pass pieces individually. The Pass  XA 30.5 is an excellent sounding amplifier. I was not impressed with the XP10. The 2 people I know that have Pass amps don't have Pass preamps. That is where I would start. Borrow a few different preamps from your dealer to compare. You might even want to try a tube preamp to see how that sounds.

Good advice.  Either add a tube preamp or Int-60.

Hi mizioa,
You probably know this but I will state it nonetheless, you have to hear the Luxman and then decide. An Audiogon friend (with discriminating  taste/good ears) has the Pass Labs XP 20 and XA 30.8. He has been very happy with this pairing. He recently auditioned three integrated amplifiers in his system which he felt bettered the Pass separates.

Lyric Ti140 - German push pull tubes
Mastersound EVO PSET 845- Italian PSET tubes
T+A 3100 HV - German solid state

You just don’t know until you’ve actually listened to the various components. As mentioned above Luxman has numerous choices at different performance levels/price points.
Charles

I have a Pass amp (X250.8) and a Pass XP-20 preamp. The XP-20 is the finest pre I've ever owned and that list includes a CJ Premier pre. I used to own an XP-10 but the 20 is definitely a cut above.