1985tqc hi, I would stay with the Parasound JC1's as being bi-polar output they can give more current than the Pass mosfets can. This is why MBL also use Bi-polar in both their big amps used to drive their top speakers.
As the MBL's are 81db and have 3.8ohm load in the mid bass and an evil -51 degree phase angle, which could bring that impedance down to 2ohms, and this is where bi-polar output amp shine for current delivery for you to get the best possible bass performance.
Cheers George