Any thoughts on Pass X150.8 ?

King you are so right. Extremely well written post! I use online opinions as a guide for things I should try... but sometimes you do have to buy something and then try it and live with it (as WC does). I have seen a lot of positive impressions with the Pass amps and also have engineers on our Sonic Visions discord that are very impressed with the way pass amps are constructed (and they are critical of 90%+ of amp construction out there... even amps costs $100k or more). So the combination of those factors makes me think its a good bet. And because Pass is recognized if it doesn't sound good in my system I can always sell it and probably not lose that much.
I am guessing Pass and luxman (m900u) are fairly safe bets for the reasons above.

White Camaros actually praised the .8 series and said the 250.8 was the best amp he's heard and. went on to say he wants to get a 350.8 when the prices come down or he's gets a smoking deal so I'm confused by the OP statement. 

I have heard the 150.8 vs. the 250.5 and the xa25 (along with Parasounds JC1s, Merrill Veritas, and lastly a Gryphon Diablo 300. The 150.8 was the most analytical of the pass amps - I liked the 250.5 the best of the Pass. The xa25 was a little too warm to me - it sounded like the "jump factor" of a hard snare drum was lost, if that makes sense.
Like everything else in this hobby, YMMV. Reno HiFi has a nice testing policy, I’d try to get whatever amp you are aiming for in your home and give it a listen for a few days.
Good luck!

Great amp buy it asap.

Old thread, but I just stumbled on it and will add I have been using a Pass 150.8 for 2 years and it remains my favorite solid state amp (42 years in the hobby).  First solid state amp I could live with, and I find I rarely use my reference tube amp anymore (and I never rotate-in my other solid state amps).  I use the 150.8 to drive QLN P3 speakers, feed by an LTA microZOTL preamp, and they all play really well together. Only complaint is the heat it produces (class A).