channels?

I was thinking about buying a second rc-7 and running 2 centers either side by side or stacking them. Is this a bad idea? My theory is.... the more sound that comes from the center the better.....true or false????

in the outline is visible the measurement mono ..... but as it convene to always measure with an escape from the skillful channel exchanging the diffusers? or to measure with skillful escape and skillful income of the soundcard and after this to invert with left escape and income left...