klipsch ksb s1

My Receiver is a Yamaha RX-V383BL and currently using Polk Audio T-15’s with it. I am looking at a set os speakers, (Center and 2 rear speakers) they are Klipsch KSB S1’s. Will these be a good fit to fill in my 5.1 system. I know these are an older discontinued set but trying to fill in my...