I am new to this forum and I am looking for feedback about upgrading my center channel speaker. I have recently purchased a new polk RM10 package consisting of 4 rm10 surround speakers and the center speaker that comes with it. I purchased a velodyne dps-12 sub, a yamaha HTR-5960 receiver and a samsung DLP 50". It's all hooked up in a 16 x 22 foot space. It sounds decent. A friend of mine has a new csi3 center channel speaker that he will sell me for $100. Would this match my system. I've heard that properly matching speakers to one another is critical in a home theater setup. I've asked what timbre matching means at some retail stores and I didn't get the impression that they really knew either. The system will be used for mostly HDTV and movie viewing. I could see myself adding some decent front speakers at some point. Any advice?