Does anyone know if it's possible to add another pair of surround speakers? I own a denon 3802 and am set up for a 7.1 surround system, klipsch R7 series (l,c,r,sr,sl,srb,slb) Is it possible to add another pair of surrounds for the sides without hindering the overall sound for the people who sit in the back? Do I need another amp to power these speakers? If so, what kind? 2 channel? 4 channel? I haven't started yet, but soon I'll be building a designated home theater and would like to have multiple rows for seating. If anyone has any information about this type of setup any information would be GREATLY appreciated. Thanks Dan M.