I installed a Polk RM6005 5.1 speaker system in my living room/entertainment center a couple of years ago. Given the constraints of making the room function with both of these functions, it has worked really quite well with the exception being the system's (i.e. the center speaker's) inability to deliver really crisp dialog. Because we mainly use the system to watch DVD's, the ability to deliver crisp dialog is just critical for us. I have looked at other modestly sized units (sized, not necessarily priced) and am trying to find out whether something like the Polk RM8C would fit the bill. Because of the constraints of the room, a center speaker over 20 inches wide just won't work. Is there a significant improvement with either the CS1 or CSR or CSi25? When I make the change, I really want to do something that will significantly improve the performance. Yes, I do know that I will have to replace the other speakers as well, but I'm trying to work backward from the center speaker.