high performance NON-GAMING computer $400 budget

http://www.bit-tech.net/news/hardware/2014/01/07/amd-a10-7850k/1
cpu.
PCPartPicker part list: http://pcpartpicker.com/p/2zkVO
Price breakdown by merchant: http://pcpartpicker.com/p/2zkVO/by_merchant/
Benchmarks: http://pcpartpicker.com/p/2zkVO/benchmarks/

CPU Cooler: Cooler Master Hyper 212 Plus 76.8 CFM Sleeve Bearing CPU Cooler ($27.97 @ OutletPC)
Motherboard: Asus A88XM-A Micro ATX FM2+ Motherboard ($74.99 @ Newegg)
Memory: G.Skill Ares Series 8GB (2 x 4GB) DDR3-1600 Memory ($79.99 @ Newegg)
Storage: Hitachi Ultrastar 1TB 3.5" 7200RPM Internal Hard Drive ($49.00 @ Amazon)
Case: Fractal Design Core 1000 USB 3.0 MicroATX Mid Tower Case ($39.99 @ Microcenter)
Power Supply: Corsair Builder 430W 80+ Bronze Certified ATX Power Supply ($19.99 @ Microcenter)
Optical Drive: Samsung SH-224DB/BEBE DVD/CD Writer ($16.98 @ OutletPC)
Total: $308.91
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-01-11 01:06 EST-0500)
 
well for $413 you could make something like this

http://postimg.org/gallery/78slmoca/
amd a10-5800k
fm2 motherboard with usb3 matx
2x4gb 1866 ram
matx case
smaller sized hdd
430w modular psu
includes windows 7 os in price (the other build doesnt and thats an extra $80-90)

for $50-100 more you could make something intel with integrated.

not a bad system for non gaming...and light use. it can even handle some light video editing though its not going to be as good as a system with a seperate cpu and gpu. any sort of complex after effects or 4k resolution is likely way beyond the capabilities though. for anything major or professional you should expand your budget by a good margin and get an i7 with a mid ranged video card. adding 16gb of ram instead of 8 also isnt a bad idea.