I have a 13X10 room that is rather plain with the exception of a bed, speakers, Entertainment system/shelf, dresser, a large window shielded with drapes and of course my computer. I have the polk psw10 subwoofer and it does the job 8 out of 10 times and sounds great how i have it set up. But with the 7.2 receiver coming i am tossing around the idea of buying another psw10. I can do that or buy one better sub for around $200 and get rid of the polk. I really dont have room for a stereo sub setup so i am leaning towards the single sub. I looked at the BIC V1520 and Infinity 12" and the daytons to start. Looked through alot of threads searching, but i feel this is personalized. Any recommendations on what the best single sub for around $200 would be? Should i just get another psw10? Please help me...its 4am and i have been searching and shopping for hours!