I had a similar configuration for about a year. Quintets for rears and center with RF-82 II's for left and right with a Pioneer Elite VSX-52. I thought it sounded good until I completed the system with the RS-52s, RC-52 and the XPA-5. I wish I would have just added the speakers and left out the XPA-5 to get a feel for the sound with just the speaker upgrade. But I was impatient. I wanted to hear it all finished. Go figure!!
Having said that, the RS-52's sound great and I think they are paired with the RC-52 and RS-52's for the RF-82 II Home Theater System. So you should be good to go providing you have enough amp to drive them.
http://www.klipsch.com/rf-82-ii-home-theater-system