I currently have a cs245 center, not 245i and am looking into upgrading my mains and surrounds. First question: Is it that important to stay with Polk for the mains? I've heard it is so that the tone matches across the front. Next question: Is the 245 drastically different from the 245i? I'm guessing it isn't and that the speakers Polk recommends matching up to it (RT25, RT35) will tonally match the 245. Third question: I have been very happy with the center channel but have been reading some very negative things about Polk in general. I think this is just "audiophiles" rebelling against a well known speaker company even though Polk makes quality products. Am I correct in assuming this or should I maybe start over (new center, mains and subs) with another brand? Any help would be greatly appreciated.