Pass X 250.8 or Pass 30.8 question?

Help me understand what would be the better amp for my situation. I know the obvious differences, One is a low wattage class A amp. The other being basically the opposite.

My setup for one of these amps is : Martin Logan Montis speakers(91db). Source components- VPI scout and lossless files through a Mac Mini through a Cambridge Azur 851D DAC.

My room is pretty lively. I don't need a lot of volume to play music. I currently have a Parasound Halo Integrated. I would say that the volume never exceeds 40% of the volume knob. If your familiar with the Parasound Halo....The volume knob is usually between 9-10 o'clock.

I need some opinions....Am I better off with a lower wattage amp like the 30.8......or would huge power like the 250.8 ( 500/4ohms) serve me better even though my speakers are fairly easy to drive and my room isn't unusually big.

I don't pretend to be an expert in home audio...so if these are stupid questions I apologize in advance. However any and all insight would be greatly appreciated. 

Also- I would really appreciate any other Pass .8 series owners to chime in with their insight and opinions.

Thanks in advance,

krelldog