Should I Sell My ARC REF 6 and Get A Pass Labs XP-32

@audphile1, thank you so much.  That is exactly the type of input I am looking for.  I understand that the XP-32 is also quite a step up from the XP22 as well.  It sounds like the differences were rather subtle, since you say that you spent a good amount of time comparing them in order to discern the differences.  I am wondering if even jumping to the XP32 will be more than a subtle change.  I originally was using my MSB DAC as a volume control.  The ARC LS28SE was lent to me by a dealer and I thought that there was very little if any discernible difference between it and the MSB.  Then I tried a VAC Renaissance Mk V, and slightly better than the ARC but again, not worth it.  Then I tried the ARC REF 6 and it was a definite improvement over the LS28SE and the VAC.  Sounds like I really need to just bite the bullet, put it in my system and sell the one I like less.  What are you using for speakers?

I tried this about a year or so ago. I traded my REF5SE in on an Ayre KX5-Twenty as I wanted to get away from the tube heat. Within 120 days I sold the Ayre and now have a LS28SE and am much happier. I never have heard any PASS gear except at Rocky Mtn Audio Fest so not a fair assessment. Although I may consider PASS should I look at new Amps. I guess my point is make sure you’re gonna be happy before you jump.

@moto_man 

Is it a REF6 or a REF6SE?

So... I have had the 250.8 for 3 years and like it. I have an XP10 mated to it and have had Focal 1038BE, Sopra 2, Harbeth 30's, Harbeth HLS5SH Super, Sabrina (not the X) most recently the Sasha 2. I then bought an ARC RE75SE- and love it. I loved it enough that I bought the ARC REG150SE- incredible amp. Then, because the ARC was an eye opener, I bought the ARC LS28- which blew away the Pass XP10 (the combo of the 150 SE and the LS28 was crazy good). The Pass set up is still very. very good- my take on the ARC though is that it's much faster, open, airy, bigger soundstage and dynamic- which you probably wouldn't expect from tubes- but- it is better than the Pass in my system. Good enough that my LS28 is with Kalvin at ARC  being upgraded to an LS28SE. I have three set's of spare tubes for the REF75SE and the 150 SE and will probably buy another set each for "back stock".  I kept the Pass 250.8 and the xp10 because they're really, really good and they're solid state. But, they'll sit on the sidelines while the ARC cranks the system and I'll use the Pass from time to time or in another system. I wouldn't rush to switch to the XP32, the ARC gear is really, really good and in my system it betters the Pass gear. 

I agree w Audphile1 on how the XP22 presents a realistic soundstage and incredible dynamics. I have mine paired w your same amp X250.8 and Sabrina X ‘s and the bass speed and volume control is sublime. 
I can only imagine how good the XP32 would sound.