well i would love to pick this post apart and give it the ole Ernie dissection but ill leave that up to you .First i guess we need to define sound bar. Currently I've only installed Leon sound bars(but i can't wait to give the Sonance SB46 a try here soon).So my definition would be one speaker with the front left center combined.Till last week i had to mount a customer supplied Sony sound bar.I tend to think of these more as a fancy home theater in a box.Inputs went into the sound bar and then a hdmi out to the panel.
So here are a few questions to further help figure out what sound-bar we are talking about !
1 Will there be a seperate receiver in the setup ?
2 For the Polk will you be using the wireless subwoofer ?
3 Is the length shooter or longer than the tv
4 Will the soundbar be mounted to the tv or the wall ?