Aegir upgrade to Pass...maybe

I have had a Schiit Aegir for about a year now. I drive quite efficient Crites loudspeakers. I am thinking of getting an amp with a little more power. The following are my leanings.
Pass LabsXA25
Pass Labs XA30.8
Benchmark AHB2
I think the XA25 will be a good choice but wondered about the XA30.8. Somewhere I read that the XA25 actually sounds better than the 30.8. The 30.8 is monstrous at 94 lbs.

Also, I see high ratings for Benchmark. Does this sound like Class A, A/B or D? The reviews say really detailed and accurate but it is definitely different than the Schiit or Pass Amps. Plenty of power for my system for sure.

Thanks for your opinions and suggestions in advance.