Tips
Get a decent Case Either Coolermaster or Antec, or Corsair.
The Coolermaster HaF-X would be my favorite, And the Antec 1200 as second best.
You need a motherboard before you pick your cpu.
1155 socket or 1366 socket if your going for an i5 its 1155.
You could also get an i7 2600k, you wont need a video card to run wow.
Because the cpu runs video.
For any other new games you would need a video card.
Check what kind of Ram DDR DDRsd DDR2 DDR3 dual channel, DDR3 Tripple channel.
And what your motherboard can run.
Hard Drive, What does it need to connect to the motherboard?
IDE cabbles? Sata or Sata2.
And how much room your computer overall has for growth.
How many hard drives how much ram how big the case is for upgrades.
Then your set for a few years.
---------- Post added 2011-03-27 at 11:56 AM ----------
Im laughing because it will break 24 hours after warranty its dell afterall.