I am looking to buy some speaker for my HT. I currently want to buy the fronts and center. I've been looking at the polk audio rt1000i and cs400 as an option. I want to spend ~1000-1500 for the three. I like the polks because of the built in subwoofer. I've also looked at the Acoustic Research AR9's. The specs say they have a "side firing woofer" is this like a sub woofer or not? Or, should i just buy something completely differently. My room is only 11x10 and i'd preffer to have something with a built in subwoofer. If anyone can hepl...plaese do.