PCPartPicker part list:
http://pcpartpicker.com/p/293GX
Price breakdown by merchant: http://pcpartpicker.com/p/293GX/by_merchant/
Benchmarks: http://pcpartpicker.com/p/293GX/benchmarks/
CPU: AMD A10-6800K 4.1GHz Quad-Core Processor ($134.99 @ Amazon)
Motherboard: ASRock FM2A55M-DGS R2.0 Micro ATX FM2 Motherboard ($53.98 @ Newegg)
Memory: Kingston Blu 8GB (2 x 4GB) DDR3-1600 Memory ($64.99 @ Newegg)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($58.98 @ OutletPC)
Case: Zalman Z9 ATX Mid Tower Case ($39.99 @ Microcenter)
Power Supply: Corsair CX 430W 80+ Bronze Certified Semi-Modular ATX Power Supply ($37.99 @ Microcenter)
Optical Drive: Lite-On iHAS124-04 DVD/CD Writer ($17.99 @ Newegg)
Total: $408.91
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-11-26 14:31 EST-0500)
is ur best bet. maybe 15$ more than 400$ but better than nothing