Pass XA25 or Pass XA 30.8

I have my XA-25 for two years. I love it with AZ Crescendo 2’s (90 dB). A wireless REL S/5 SHO takes care of the very bottom end. Perfect.  Never tried the 30.8, it won't fit my rack (Symposium 3-leg).

bobheinatz-
I bought my XA-25 after scouring the audio reviews. I wanted to buy an amp that would satisfy the upgrade itch for sometime. I came to the conclusion that Nelson Pass was the audiophile version of Moses, and his amplifiers were like commandments. (more than 10)  Another thing that I liked was the fact that he'll actually answer his email's.  So after conferring with NP and Sean Casey of Zu Audio, about the First Watt F-7, J-2 & Sit 3.  I decided to buy the XA-25. I thought that It would be the most versatile, if I ever decided to buy another set of contrasting speakers, like Maggies; and it would adequately mate with my Audio Research LS-3.
I think the XA-25 might be very sensitive to speaker cables. I just recently received the Libtec speaker cables from Zu audio e-bay and that was a significant difference in sound right out of the box, from the Mission Mk l's. So far it's been very transparent with good bass and plenty of power. I have not had an issue with "thinness" that a few have described.
I hope my twisted sense of humor didn't offend too many.
You probably couldn't go wrong with any of the Pass Labs/First Watt amps.
IMHO

Ask Mark at Reno Hifi for his take on the differences. Very high integrity.
i could have purchased a new amp from him, but he suggested that I keep my Pass XA-60.5s.

Reno HiFi has demo units in both models, according to the website

I would also ask teajay on these forums for his opinion. He’s had experience with several Pass Labs models.