I agree with Gonk, 100%. The extra 75 wpc is not going to change the sound of your B&Ws very much. Louder speakers always sound better no matter what manufacturer makes them. In your case the sound would damage your hearing, well below the limit of the amp. It is true that the extra wattage may help prevent the amp from clipping, but at that level, something else will give out first, likely your marriage or your front door as the cops break it down.
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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