I'm in a interesting bind. Currently with the POLK promotions I can purchase (2) BRAND new POLK PSW505's for $589 shipped. My original thought was getting (1) SVS PB12-ISD subwoofer for $599. Although, since SVS does not offer free shipping this would actually make the total cost around $660ish for the SVS. With that given, how would the concept of just going with the (2) Polk's, which on paper would give me 600 RMS watts, vrs 320 RMS with the SVS. Given how highly touted the SVS products are, would it be a bold claim that (2) POLK PSW505's could match and perhaps exceed the overall experience of the (1) SVS PB12-ISD? My theater room is also very large, I'm trying to keep the cost somewhat down but yet want to really fill things up. Am I just fooling myself here.. Should I just somehow find another $300 and get the "PB12-ISD/2" for $899? I wish shipping was free let me know what you think would be highly appreciated as I hope to order soon. Thanks gang!!!