~$550 usd for MoBo/CPU/GPU/Ram. Advice please!

Building a new machine. Right now concentrating on the essentials, and will work up to the rest later.

I am figuring spending that much on the 4 essential items. My goal is to play to the following games at around or above 60fps at a good resolution, like 1600x900 or 1920x1080 or above. Or basically just as good as possible.

Games I would like to achieve this with:

Skyrim (hopefully with the "realistic" mods)
Borderlands 2
Sleeping Dogs
ArmA 2
etc..


While I am looking to max out any effects possible, I am willing to put AA on the backburner for the high end games.

If I am dreaming on these type of games with those settings, with that budget, let me know.

The MoBo/GPU/CPU/RAM I am looking for online. Other stuff, I will be purchasing where I work with some nice discounts (just a little above cost basically). I can kind of figure out what to look for on the rest thankfully. But for the 4 essential mentioned parts, I would love some advice.