Trying to stay around $550

I mean, that's pretty much all you can do. It should be able to handle most games with max settings at 1080p. The i3 may hold you back, but it's still a little beast.

The only thing I suggest is to use this PSU http://pcpartpicker.com/product/DPCwrH/seasonic-power-supply-ssr550rm - it has 50 more watts, plus it's certified 80+ Gold...and it's semi-modular which means easier cable management and put away what you don't know.
 
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