The Reference series doesn't seem to match the Legend line in terms of pitch, and I havent been able to locate any KSP-S6's to finish out my 5.1.  Any suggestions would be greatly appreciated.

The KSP-S6 are the best match that I have heard for movies and that is what I currently use in my setup. I used to use the RS-3 for surrounds, and they performed quite well. While not the best match for pitch, I actually prefered the surround affect with the later setup. I always run my surrounds a little louder than proper levels, just a personal thing. I would like to experiment with two more C-7s for the surrounds. That would be a great surround for music.

When I had the KLF 20/C7 I used SB 3s for rears.   

Dual klf-c7 or a pair of klf-10s/20s?  KSP-S6 do sound good, but even then they are still from a different line (synergy premiere).

I have some KSP-S6's in black. Send me a PM or e-mail if interested.

I have the SS-3 as surrounds in my setup (see signature line) and they blend in quite well.