Tell me about what kinda music you listen to: rap? rock? techno? Do you want really tight bump or low rumbles?

Yeah, your budget is small, but look for deals. I have JL subs (2 10w3v2s) and a Rockford amp (451s). The subs I got on clearance for $300. I love the subs, most will tell you the same thing. So maybe you can go with a step down in subs and a less-overpriced amp, and you'll be kinda close to your price range. These guys can recommend some other lesser known, better value priced stuff, but I do love mine.