What's a good PC for this game?

[Tiberius]

I've decided to build a computer - I can definitely do it. I just need someone to pick the right parts for me. Here are my answers/constraints:

1. Are you building this computer yourself or having one built for you (Like HP, Alienware, or even a small shop)?
Building it myself.

2. What is your budget and does that include shipping/taxes?
Under $1000. Willing to spend a little more on the video card if it will pay off (GeForce GTX 670)

3. Where do you live (Please list town, state, and country)?
San Diego, CA (I'll be on wifi internet)

4. What do you need this computer to do (like gaming, Photoshop, and so on)?
Just playing PlanetSide and using Microsoft home & office for work.

5. What parts will you need for the computer? List what parts specifically, saying you need everything will not do.
GPU, CPU, Motherboard, HDD or SSD, Memory, Case, Optical Drive, Monitor, Power Supply, Keyboard

6. Are you reusing any parts for this computer? If so say what parts (make and model).
Negative

7. What kind of monitor/resolution do you have or want to get to use for the computer?
I'd be happy with around a 15.6" Monitor, with nice resolution. Nothing too big.

8. Do you have already have a OS or do you need one? What OS is that?
I need Windows 7

9. What are you looking for the motherboard to have feature wise? Like SLI, Crossfire, Firewire, USB 3.0, Sata 6.0 Gb/s, and so on.
Not sure what any of that is, definitely at least 3 USB ports, lots of GBs

10. Any plans to overclock the CPU or GPU?
Not sure what that is, my last Nvidia card was though.

11. What time kind of time frame are you planning on ordering these parts?
I'm hoping to get it up within the next three months. If there's some awesome release in over that I can wait. I know the Windows 8 is coming out in October so there might be some nice new hardware on the horizon which will surely create some deals on older stuff.