You can Save money on the Power supply..
Mushkin 550 Watt 89.99$
You can save money and not buy norton.
You can use Avast or AVG both free.
or you can aquire Symantec Corporate 10 or NOD32 (Throughtorrentingcough)
You can also save money on thermal paste and get this one. Its still Artic silver 5.
(Just less amount, That tube is good for 4+ Applications)
Can also save money on the case, there are plently of huge cases for less than 200$.
Take a look around www.sundialmicro.com
also, they have alot of big cases.