Off hand what brand/model would be a good upgrade from the Parasound Halo?
Pass is also Mosfet, I think.
Seeing now your looking at poweramps, a step up would be the JC1 Halo’s in high bias Class-A mode.
This is Stereophile's quote to the load the Montis present.
"
Either way, that this speaker is a difficult load for the partnering amplifier to drive is compounded by the high electrical phase angle"
Cheers George