The F-3s are just a great speakers for the money. I end up getting the C-2 with a pair of S-2s. They sound great! I also got a pair of Quintet IIIs just to compare and found that they didn't make much difference with most movies on blueray disc. However, like Klorslug said, I had to bring up the level to +3bB and crossover to 120kh on the Quintets. So yes, I end up using the S-2s and my Quintets for surround. It never hurts to have more speakers. J