cs1vs csi3 and cs2 vs csi5

Barton82

Hi i posted something a day or two ago but no replies. I have polk rti4's for back surround, and older towers but i need a center. I don't know anything and would like an opinion about these four. will csi3 be good or will cs2 and csi 5 sound better? If so will it make any difference between any of these four. thanks.

crd2002

here are some debates on the two
http://www.polkaudio.com/forums/showthread.php?t=59919