Need some help buying a new computer (Gaming computer. Mostly for World of Warcraft)?

Need some help buying a new computer (Gaming computer. Mostly for World of Warcraft)?

So my other computer (that I used for WoW) is completely garbage and I'm buying a new one. I need some help on what I should get that will give me good a good FPS while running WoW. Making one from scratch is out of the question. as I am completely retarded with computers. I'm going over to staples today to see what they have, so I need your help on what I should get. 
Biggest things are processor, video card, and RAM.

What you should shoot for if you can afford it:

AMD Phenom II or Intel Core 2 Duo (Dual-core, quad-core even better)

Radeon HD 4800 series video card (Nvidia makes good cards too, but way more expensive)

4GB of DDR2 RAM

What this would cost if you were buying the components yourself:

CPU: 100-200
Video Card: 100-150
RAM: 50-100
Best Answer:  You only need about 2gb of RAM to play WoW. It's not a very demanding game. Any 128-bit video card or higher would be fine.

Here's a nice deal at staples if your looking for a new monitor as well: