I find all this very strange. I have carefully audition speakers with that coaxial driver. I have found it to be very accurate and neutral with excellent voice clarity.\nIn addition I use a driver based on the original KEF coaxials from SEAS. That center is just plain excellent. Admittedly the crossover is my design, and the electronics very different. However I find it hard to believe this problem is due to that speaker, and suspect position\/set up problems. I would disable Audyssey for one. That program ruins all my systems.\n\n\n\nIf I disable Audyssey they just sound too dull. The best example I can give is the Atmos demo clip Shattered. The breaking glass sounds dull and flat. With Audyssey, it sounds like you'd expect glass to sound. I don't find it to be overly bright or harsh that way either. I wouldn't say Audyssey ruins things all the time....it can make things better and it can make things worse. It has limitations. I would prefer to limit it to 200Hz and below because it does a good job at smoothing out two spikes in my subs. But if I do that, the sound is just too dull.....maybe that's neutral, I don't know.\n\nMusic is a bit different, where sometimes off is fine, but also can sound a bit dull and lifeless. The reference curve isnt really ideal for music (and I am using the steeper rolloff right now, but after I move the speaker will try moving back to the more subtle reference rolloff). Flat usually is better for music, but too bright for movies from what I have tested so far. \n\n\nI guess what would help me is from a technical standpoint, should I expect that the KEF Q series is superior to the Polk RT600i CS400i setup I have? My gut is yes, but I want to make sure I am not expecting too much from the Q series and going through all these hoops expecting better than what I had. I know polk isnt an audiophile favorite and I agree there are far better speakers out there. The Polks I have were mid tier at the time and pretty well reviewed (remember this was the internet back in 2002). The CS400i in particular was well regarded, but it was one of a few larger centers at the time.\n\nI need a gut check that my expectations aren't too high and that it is reasonable to expect the Q750 and Q650c to outperform what I have.