PCPartPicker part list:
http://pcpartpicker.com/p/xS26
Price breakdown by merchant: http://pcpartpicker.com/p/xS26/by_merchant/
Benchmarks: http://pcpartpicker.com/p/xS26/benchmarks/
CPU: AMD A10-5800K 3.8GHz Quad-Core Processor ($129.99 @ Newegg)
Motherboard: ASRock FM2A85X Extreme4 ATX FM2 Motherboard ($79.99 @ Newegg)
Memory: G.Skill Trident X Series 8GB (2 x 4GB) DDR3-2400 Memory ($94.99 @ Newegg)
Power Supply: Corsair CX 430W 80 PLUS Bronze Certified ATX12V Power Supply ($29.99 @ Newegg)
Total: $322.96
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-01-16 02:54 EST-0500)
I selected the wrong tridentX kit, thats got the ram cooler which you don't need the normal trident x 2400 come in at $70 so $20 less then you just need a case.