Upgrade help

[Raymac]

OK, it's finally time for me to upgrade. It has been a few years, and my goal at this point is to get a computer that can run Planetside 2 today at a respectable framerate. As of right now, with the tweaks I've made, I get about 60-70 fps in the warpgate and I drop down to single digits in large fights. In a Biolab fight, it hovers around 15fps. So I'm going to answer the questions in the sticky, and I'll be free to answer any questions that come up. Thank you very much for taking the time to help me out.

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?
-$400 - $500ish

3. Where do you live (Please list town, state, and country)?
- California (knows how to party)


4. What do you need this computer to do (like gaming, Photoshop, and so on)?
-Planetside 2...period.

5. What parts will you need for the computer?
- CPU, Motherboard, RAM, (hopefully not a PSU)

6. Are you reusing any parts for this computer?
- Case (Good sized alienware, not sure of exact type), GPU (EVGA GTX260 Core 216, 896MB, I know it's older but that upgrade is for later), PSU (OCZ ModXstream-Pro 600W), Hardrive (HDS722516VLSA80 ATA, ancient), two DVD drives, and even a floppy drive.

7. What kind of monitor/resolution do you have or want to get to use for the computer?
- HP S2031 at 1600x900

8. Do you have already have a OS or do you need one? What OS is that?
-Windows 7 Home 64-bit

9. What are you looking for the motherboard to have feature wise?
- Unsure, probably SLI but other than that I'm open to suggestions.

10. Any plans to overclock the CPU or GPU?
- I'll OC the CPU slightly. It will be air cooled with an after market fan which I already have. (Not sure of the make model yet, but will update if I can)

11. What time kind of time frame are you planning on ordering these parts?
- Now

UPDATE: OK, I've pretty much decided on the i5-4670K. The upsides are worth the minor price increase. Still looking for suggestions on the mobo and RAM. Or I'm open to hearing why I am wrong for going with the 4670K.
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Current specs:
AMD Phenom II x4 965 3.6Ghz
GTX260
ASUS M3N78-VM
4GB DDR2 RAM