If you upgrade your rears, don't you know have sides as well? [Linked Image from softronix.com]

ie purchase 5k5 rears and then you can move the 5ks to the side.

Of course if purchasing 5k5s means selling the 5ks, then that is another story.

I personally prefer dipolar speakers on the sides. I picked up a pair of Paradigm Active Dipoles. (Now if only Meridian would build a pair of DSP dipoles.)

Stacey Spears
Co-Creator, Spears & Munsil High Definition Benchmark, Blu-ray Edition and Lighthouses of the Pacific Northwest.