Anyone have previous personal experience with the both the CS2 and the Csi3/5? I have Rti10s up front and understand that the CS2 is not the ideal match, but do you think there would be much of an improvement moving to the Csi3? Would I have to move up to the Csi5 to see much difference? I don't notice any timbre clash. However, my limited experience with audio is that you don't know what you're missing until you you've had a taste of something better.