rwings01

Hi All, I just purchased a Klipsch RF-35,RC-35 & RS-35 system. Also, using HK AVR635. My ? is what's the best setup for this system? I've read putting speakers to small is the way to go and on the other hand i've read putting mains to large is the way to go.I tried both and they both sound good.Right now i have my mains to large at 40hz, center to small at 100hz and sorround to small at 100hz, 12" sub at 120hz lfe is sub. Is there a better configuration? Someone told me to put all speakers to small at 80hz and sub to 150 hz because this is what THX recommends. Any info would be much appreciated. Thanks