You are looking at buying a GTX 750 Ti.
I have a GTX 770. On ultra settings, and not in raids where I have 25-30 other players on the screen with me, I get roughly 90-100 FPS. My monitor can only display 60 FPS, so I turned Vsync on so the video card would only draw the frames that can actually be displayed (60).
On that system you are looking to build, your CPU is weaker than mine. And the video card you want to buy is 2 levels below what I have. Will you get 60 FPS. Probably, and if you do not, lowering the settings to High instead of Ultra most surely will get you there.
If you want to see what I have for hardware, hold your mouse over the Packer Fan thing on the upper left of this message.