I'm trying to find a good sub for my HT and i'm on a tight budget keep it under $600. I've been comparing from Polk's ebay store
Polk micropro 3000 ($510 used or $800ish new)
Polk DSW pro 600 or 500 ($400ish)
Polk PSW 505 ($250 newegg)
Any thoughts? Besides being more expensive how does the micropro compare to 505, where does the DSW pro 600 fit into the mix? And is there any other sub that are better for the money?