Just bought the Onkyo TXSR800 Friday from work. I had a 6.1 receiver before, which was running with one center surround speaker. The Onkyo says THX recoomends 2 center surround speakers. My question is placement. Right now my center surround is centered between my 2 regular surrounds. Do I evenly seperate all my surround speakers or do I need to put both center surrounds in the center and maybe a foot apart? Any help is greatly appreciated!