What are the most important things to look for in matching center with fronts? Frequency response, tweeter material, type of horn, etc.... I've got a pair of 1996 Forte II's but need a center that comes closest to matching the sound of the Fortes. I am not getting the Academy or adding a Forte as the center )it' s out of my budget and they wont fit. I've been looking at KSC-C1, SC-1, and the SC.5. Any help would be greatly appreciated.