Even thow i was the one who answered your question and you picked his solution no grudges held
. But to help you a bit more did you buy the system or did you build it your self . anyways add as much case fans to your case (if you know which one it is please specify *the case*) to the front for intake and as much to the back and the top for outake this will cause positive pressure
for a heatsink http://www.coolermaster.co.uk/product.php?product_id=6603
it's really cheap and the results are great and i know your new at this but there are many great tutorial videos on youtube which you could watch to help you mount it.
Have a good one and what are you using your system for gaming, web browsing etc