Would it be better to just buy a new computer with all the parts (having someone else install everything) ? I was looking at EVGA GeForce GTX 580 and wanted to make something that could play Starcraft 2, Diablo 3 at max settings, I just have no idea what parts I need.
So here is a great gaming pc under your price you just need to make sure you pick a case with a place to put the radiator for the liquid cooling. A corsair with the slots for two 120mm fans on the the top will be good. This would be a beast of a machine it will blow your mind how fast it does tasks and the gaming would be outstanding plus you can always hook it up to your tv. Oh yeah I forgot a cd rom drive but you can decide if you want blue ray or not.