I am currently looking to purchase as sub to compliment my HT system. I have an Onkyo TX-SR702 receiver, Athena AS-F2, AS-B2, and AS-C1 speakers. The subs I have looked at and am considering are the SVS 20-39 PCi and PC+. What are your recommendations on this. My room size is 20 x 25 with ceiling going from 9' to 25' as it opens to the second story of my house. I am 50% cable watcher, 25% music, 25% DVD movies. Any help would be appreciated.