Quality CPU cooler:-
click here Or a Radeon 9700 if you're loaded!
I'm not an advocate for ebuyer, it's just easy to cut 'n' paste their links.
I have bought from them (very nice peeps), but also recommended is Eclipse Computers
They do some pretty good special offers and some very nice cases.
I just built a new PC with bits from both these traders.
Hope this helps!