Thanks, your posts have been some that I have been reading as I'm also trying to figure out the center channel.
I've got an oldschool B&W N-HTM2 that I really love but want to match whatever new mains I get with the center channel, so a C25 for the F35s would be the logical fit. It just barely clears my 19.75" furniture front opening width maximum so thats the direction I'm pointing.
I noticed you got rid of your C25 in favor of the RC263 center, though from what I can read the C25 seems on paper like it would be a bit better. However, the RC263 is a good performer and the price is very attractive and the W M+T W design does appear better for horizontal dispersion. How does the timbre matching sound with the F35s?
*edit: I misread the width, the RC263 is too big for me, as is the RC252, so I guess those are out.