Pass X-250.8, X-250.5 or XA-30.8...or?


Hi.
I am looking for an amp to drive my Revel Ultima Salon 2's.

I have always loved Pass designs, owning a few of his great amps in the past.

I don't think the 30.8 will drive my Revels. And I'm hearing that there is a noticeable increase in sonic performance between the .5 and .8 amps.
I will be using a Krell EVO-202 as the pre.

Would love to hear your thoughts and observations.
I need a reliable amp as I live in Hawaii and shipping stuff to get it repaired gets really costly! 

Aloha!

mauidj
for me, the X250.8 was a significant upgrade from the X250.5      Same for a friend who did the same upgrade
Guys-

for those that stepped up from a Pass Labs .5 series to a .8, tell me about the sonic difference(s)?
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