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
My amp never ran that hot and it was open,dynamic with great stage and great bass detail.Enjoy!!
I’ve only heard the older Pass X250 and I didn’t think it was anything special. It sounded just like any other high powered SS amp even a little bright at higher volumes. It sounded reasonably decent with a tube preamp sitting in front of it but so did my high powered Adcom amp. I thought Bryston 7B-ST monos sounded better in the same system. I understand the newer .5 and .8 versions are significantly better but are priced higher accordingly.
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).