Which would you choose; Pass 250.8, arc 75SE or luxman m900u?


Current amp great soundstage but not exciting.
roxy1927
@celander I agree. We need more of what you are recommending and much, much more shared (including additional context) so that those reading can make choices, with higher degrees of confidence and informed processing. Very Well Said. Thank you!
Without wanting to engage in regurgitated info already posted, the OP will ultimately want to select one or two of these amps for audition in his home system. All we can do is provide informed guidance to him. 
I have the Pass Labs 30.8 amplifier (class A) and it sounds great for the pop and jazz music I listen to. If I listened to classical music I would probably own a tube amp. 
in all candor it’s always about the first watt quality. luxman and ref 75se have that in spades. then comes the mojo which they knock out of park. fwiw