yeah, klipsch and polk have a similar sound imo. from what i've heard from the klipsch i've demoed. as far as imaging and the "brightness". i honestly dont wan't to pass these up for the price, even if they don't replace the polk's i can use them as a seperate stereo system. i probably wouldn't replace the polks just yet with them though because i'm hanging on to the polks because of the bass extension and the fact i'm not using a sub. i'm also seriously considering some RF-52's so if i decide to get those in the future, the synergy's would make great surrounds. i need new ones anyways because i have been using optimus bookshelfs for awhile, while they don't sound particularly bad they don't compare to the polks.