That, I could understand if it was a Q Acoustics 5.1 system...
KEF's UniQ design has different dispersion characteristics to most loudspeakers due to the coincident nature of the drive units (treble unit set in the middle of the mid/bass driver). Because of this, I'd look at the Q500's.
I would also highly recommend changing the centre to the Q200c too - the front three speakers are the most important as they're producing the majority of what you hear, and are setting the initial soundstage (everything that happens on the screen).