How about this build? ($550 budget, sans keyboard and mouse)
PCPartPicker part list:
http://pcpartpicker.com/p/1l2yF
Price breakdown by merchant: http://pcpartpicker.com/p/1l2yF/by_merchant/
Benchmarks: http://pcpartpicker.com/p/1l2yF/benchmarks/
CPU: AMD FX-6300 3.5GHz 6-Core Processor ($109.99 @ Amazon)
Motherboard: Gigabyte GA-970A-DS3 ATX AM3+ Motherboard ($69.98 @ Newegg)
Memory: Kingston XMP Blu Red Series 8GB (2 x 4GB) DDR3-1600 Memory ($58.99 @ Newegg)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($59.99 @ NCIX US)
Video Card: Sapphire Radeon HD 7850 1GB Video Card ($129.99 @ Newegg)
Case: Corsair 200R ATX Mid Tower Case ($53.98 @ Newegg)
Power Supply: XFX 650W 80 PLUS Bronze Certified ATX12V / EPS12V Power Supply ($49.99 @ Newegg)
Optical Drive: Samsung SH-224DB/BEBE DVD/CD Writer ($14.99 @ Newegg)
Total: $537.90
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-07-26 20:10 EDT-0400)
And I would like to point out your build...plz don't be piss off if I am too critical
1. A6-5400K only pair w/ FM2 mobo, so your 780G mobo is not compatible w/ A6-5400K
2. DDR2 RAM is out of date, only old rigs upgrade will use such RAM (And only 2GB RAM? u'll kill yourself while finding out your rig is so slow because of lacking memory).
3. And it seems that A6-5400K w/ an IGP but u choose HD 7770 as your gfx, u'll waste precious money on a HD 8470D which u'll never use.
Still, we wanna hear what u'r thinking (What u'll us this rig for? for gaming? for just everyday use...)and your exact budget.