Your's was a pretty good build, with just minor drawbacks. Since you said you can push to 550, I have added one SSD, additional 4GB memory and a CPU cooler. Have downed the PSU a bit, since 600W is overkill for the build. 450W max is enough.
Heres the build:
[PCPartPicker part list](http://pcpartpicker.com/p/JMNDXL) / [Price breakdown by merchant](http://pcpartpicker.com/p/JMNDXL/by_merchant/)
Type|Item|Price
:----|:----|:----
**CPU** | [Intel Core i3-4150 3.5GHz Dual-Core Processor](http://pcpartpicker.com/part/intel-cpu-bx80646i34150) | $103.98 @ OutletPC
**CPU Cooler** | [Cooler Master Hyper 212 Plus 76.8 CFM Sleeve Bearing CPU Cooler](http://pcpartpicker.com/part/cooler-master-cpu-cooler-rrb10212pg1) | $25.98 @ OutletPC...