A nice beefy case and an extra fan or two can't hurt if you have extra cash to flash. Try to look out for two balls, ball-bearing fans. They're as quiet as a mouse and as good as it gets without buying some "hyper fan" from the future or investing in scary water cooling
![Shocked :shock:](./images/smilies/icon_eek.gif)
Other than that, make sure the powerbox is decent enough (I'd aim for 450watts or higher) and the motherboard nicely sized.
Good luck with it all, and be sure to get some rubber gloves or an anti-static wrist band with any bits left over
![Razz :P](./images/smilies/icon_razz.gif)