Hi everyone. I have a little problem. I recently upgraded my home theatre speakers to Polk's. They consist of a pair of LSi15's, LSic center, and a pair of LSiFX's rears. I was wondering if anyone can steer me to a really good-great subwoofer for anywhere up to $1000. I was looking at a couple Velodyne subs on ebay and also the Polk PSW1000 or PSW505. Can someone give me an idea of what I should go for. Thanks.