so you will use the onkyo only as as pre/pro, there will be NO difference @200 watts or 125, the signal will drive them the same unless the signal exceeds 125 on the rears which is highly unlikly, and you will need ear surgery if you listen at those levels.

Sunfire amps & processor Sammy 50" Crown amp 2-SVS SS Maple Ultras, Axiom 60s,22s,150cc, QS8s