What sub woofer(s) should I buy to have the hardest hitting bass for outdoor parties?

I am on a budget of $200 for the subs, enclosures, and shipping. (suggestions up to $400 are welcome)

I already have everything else and I just need the sub woofers. My amp is only 3000 Watts and 2200 is already used. The purpose of the system is to throw outdoor dance parties and I really want to FEEL the music.

Thank you!