My cousin had a pair as surrounds for his 5.1 system, R26-F mains and R25-C center. They're weak.
If your other speakers are the same Klipsch series and you feel you need to stay with that, try to bump up to the R15. If not into the Klipsch, look around. As it turned out, my cousin ditched it all and now runs PSB Imagine T, Imagine C, and Imagine S for his system.