Hi, I'm new to this forum and am looking for a good home theatre system. I have the Harman Kardon AVR230 Receiver and am planning on getting the RTi8 for front, CSi5 for center, FXi3 for surround, and CSi3 for rear. I'm thinking about the Polk's PSW 650, 550 or the 505 for sub, but I've also seen alot of praises for the SVS subs. Has anyone here compare the Polk's and the SVSs' subs side by side? Which one should I go with? My living room for the apartment is only about 13x10, but I can be loud without disturbing the neighbors. The Polk's and SVS is comparable in price but the SVS can reach much closer to the 20hz range than the Polk's. Please let me know exactly which model of either brand would you recommend and why. Thank you very much for reading this.