PCPartPicker part list:
http://pcpartpicker.com/p/1FIPo
CPU: Intel Core i5-3350P 3.1GHz Quad-Core Processor ($175.98 @ SuperBiiz)
Motherboard: Gigabyte GA-H61M-S1 Micro ATX LGA1155 Motherboard ($41.99 @ Amazon)
Memory: Kingston Blu Red Series 8GB (2 x 4GB) DDR3-1333 Memory ($48.96 @ NCIX US)
Storage: Toshiba Product Series
😀T01ACA 500GB 3.5" 7200RPM Internal Hard Drive ($39.99 @ NCIX US)
Video Card: MSI Radeon HD 7950 3GB Video Card ($179.99 @ Newegg)
Case: Sentey CS1-1398 PLUS ATX Mid Tower Case ($19.99 @ Newegg)
Power Supply: Corsair CX 500W 80 PLUS Bronze Certified ATX12V Power Supply ($34.99 @ Newegg)
Total: $541.89
*I noticed that you prefer AMD rather than Intel, but since you already have a good AMD build above my...