The Cooler Master hyper 212 plus cooler will take you to around 3.8 Ghz, but after that, the heat is too much for it. Here is a model for only a couple $ more that should do better: ZALMAN CNPS10X Performa
Here is another Antec case for only $18 more, after rebate: Antec Twelve Hundred Black Steel ATX Full Tower
Here is a combo package for the CPU that upgrades the motherboard to an EVGA X58 FTW3 132-GT-E768-KR LGA 1366
for only $3 more. EVGA is not really the best high end mobo maker. You might want to consider ASUS or Gigabyte. You are able to get better PCIe slots with this ASUS P6T LGA 1366 mobo/CPU combo
Consider slightly more expensive memory: G.SKILL PI Series 6GB DDR3 1600 for $155.
This stuff has lower voltage at 1.5v and lower latency. Both will help you overclock that i7-930, especially because it is not unlocked.
Just an observation on the overclocking: I have an i7-920 that has been tweaked to 4.2 Ghz, but for everyday use, I have it running at 3.3 Ghz. Above that involves extra heat, and more wear and tear. Plus, the the performance advantage is not that great.
Let's see, the GTX 480 is about the biggest power draw for a GPU. Might need a new junction box into you rhouse for it (just kidding). Do not look at any PSU less than 1000W. According to this Antec Power Supply Calculator
, it is recommending 904W. Here si a good price on a highly rated unit: CORSAIR HX Series 1000W for $192 after rebate