Thanks, Kr4 (Kal). I'll take your advice and keep the center channel intact. Dip at KEF recommended the R600C for use with the 107/2s. I was skeptical, but it seems to be a good choice. There was a noticeable mismatch with the old KEF 200C, but the sound stage is seamless with the R600C. I suspect KEF has done a lot of development of the Uni-Q. The Uni-Q of the R600C looks similar to that of my LS50s.
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