I plan on getting the F3's in the near future, I already have the Synergy 12" powered sub, the C2, and the S1's. All I need is the F3's and I got all Klipsch Synergy speakers. For right now though I'm using my Fisher 15" floor model's for Front L and front R.
Thanks for the reply, I didn't really think it would matter if I mixed it up a lil. But thought I'd ask in case someone knows more info on it.