First off, yes that setup will be able to run wow at its full potential. The parts are definately compatable. Your cooling/ventilation looks good with what you listed.
I would advise against skimping out on the processor, it will be much less beneficial, but you should still be able to SLI in the future. For your current rig: 1. Get liquid cooling for your cpu, if you don't already have it.
2. You could use a better graphics card, probably a geforce gt 240 1gb 128-bit gddr5 or better (depending on your power supply).
This is just straight overkill. A 980X will future proof your system though. Yeah, you will be able to max out everything except metro 2033.
The 480 is the fastest single core gpu out. Though id suggest waiting for the 6000 series from ATI, there releasing in about a month if you can wait that long.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.