Ok thanks for the advice. Now a follow-up question...
Which of these fans should I buy as a replacement?
http://www.newegg.com/Product/Produc...&Go.x=0&Go.y=0
(I'm assuming an Antec fan is the way to go since this is an Antec Sonata case 'n all and it's been real quiet up until now, but if there's another one I should look into, lemme know. And no, I don't care about the LED light thing, so that's not an issue. I just care about keeping my computer cool and quiet)