IamDavid: Are those really that expensive? I got that model for $100 from a guy I know who was strapped for cash. He offered, I took it. I didn't know I was getting such a good deal.
Subs are expensive. If you have cheap speakers, and are not a fanatic, just check out
ubid. You can get some really good deals there. If you only spent a couple hundred or less on your mains, then there is no reason to get a >$200 sub.