I'm still a newbie as far as technical aspects of speakers go. I am trying to find the best surrounds to match some Klipsch KSF-10.5's as mains and a Klipsch KSP-C6 as center. I am told that it is best to match your surrounds specs as close as possible to the rest of your speakers. In comparing the specs of the center and mains, everything looks basically the same except in Frequency Response; Mains Frequency Response: 36Hz-20kHz+3dB Center Frequency Response: 63Hz-20kHz+3dB They quit making these models a few years ago so I will probably be buying a non-Klipsch surround with similiar specs or building my own. Should I match the surrounds with the 63Hz, the 36Hz, or does it matter?