I believe you will be able to calibrate the Kefs. Make sure you exhaust all options before getting a simulated surround system. I had the Yamaha ysp-800 and it did not come close to a real 5.1 system. So if you are picky about your sound you may be disappointed. If you have no choices then the Yamaha, Kefs, Polk Surround Bar are should do a acceptable job. By the way the Yamaha will be much more sensitive to your room setup vs the Kefs or Polk Surroundbar.