Pontiflex,
Thanks for the feedback.
Great that you made the effort to listen to some Pass amps. Yes, they are MOSFET output stage amps (as opposed to bipolar) & I believe that also has something to do with the sonics that you heard given that MOSFETs are a square-law semiconductor device.
See if the dealer will allow you an in-home demo - that would seal the deal for you in terms of confirming whether or not you want to save up for Pass amps going forward.