It is likely to be a little more power than waht the surrounds need since the 7125 actually outputs more than 125 WPC. It also is for all channels driven at the same time. It is rated pretty conservatively and will drive almost any speaker out there very well. Since you have a 5 channel setup you could even bi-amp your mains and still drive the rest of the speakers. You could also just get two 2200 monoblocks and upgrade the power to just your mains. Either way the amps are going to way outperform the AVRs power
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Music system
Model 990/7500/Magnepan 1.6 QRs/Technics SL1200 MK2/Aperion S-12 Subwoofer/OWA3/Sony NS75H DVD
APC H15 Power Conditioner
TV System
Large Advent Loudspeakers/ Polk center/Monoprice surrounds/Panasonic Viera 42 inch/Onkyo HT-RC260/Sony BDP S590/Directv
Home Theater System
Onkyo PR-SC886/Outlaw 7125 Klipsch RF-82 L/R,RC-62 center, RB-35 SR/SL, BENQ HT1075, Outlaw LFM1-EX/OPPO BDP-83/Directv
Harmony ONE
Blue Jeans and Monoprice interconnects
APC H15 Power Conditioner