I've got a pair of KG4's and am wondering if they are suitable for use as the front pair in a home theater 5.1 surround sound setup. I'd rather use the kg4's than purchase a new pair, unless I need to do that to achieve good surround sound results. Does anyone know if the current model Klipsch center channel speakers are comaptible with the kg4's? I'm new to home theater/surround sound, and would appreciate any help anyone can offer.