Perhaps that there are just two of us, sitting 8.5' from either main and 7.5' from the center, is the reason it's so hard to tell whether or not the center channel is active, except for a slight coloration. I certainly don't think a KEF 200C is junk, but it's not a Reference 104.2 either. As a lark, I've thought of trying one or both of my AR3a speakers in the center, because they do have dome tweeters. It's been so many decades since I heard them that I can't remember how they sound. Unfortunately, a 104.2 in the center, as Kal suggests, would impinge on viewing the bottom quarter of the screen.
db
db