Pass Labs Power amps choices


I am selling my Krell EVO components and moving over to Pass labs.
I just snagged a very nice X-1 for a song and now need a power amp to move my Revel Ultima Salon 2 speakers.
So my thoughts are either 250 or 350 stereo amps. Question is...how much different/better are the .5 and .8 varieties over the older x-250 or x-350 amps?
Many thanks.
Aloha!
mauidj
I am considering the 250.8 over the 250.5 I am  currently using but it is $10,000 CND plus my 250.5. Is the difference in sound worth $10,000 plus  my 250.5?
mitchb - Do I like the 250.8 better than the 250.5. Yes, absolutely. (own the 250.8, have heard the 250.5 in the same system)

Is it 10k CAD plus your 250.5 better? - Likely not. What else would you do with the 10k?

Do you have your "end game speakers"?

What pre-amp?

DAC?

... all about allocation of funds.

Now, do you have a burning itch to have the 250.8 and the 10k isn’t a huge stretch - sure, it’s better (to my ears).
If you get the .5, you will lust after the .8 forever.  Just get it now and never look back.
Read my review of XA200.8 at Dagogo.com 
I discuss the difference sonically between. 5 and .8 series. 
If you don't believe because I am a reviewer,  shame on you!  ;)