There you go, but expect to pay more....
CPU+MB: Intel Core i5-3470 + ASRock B75M-DGS @ $304
Pay slightly more over P series CPU for integrated graphics as backup lest main discrete graphics card goes lemon in the future, guarantee zero downtime to regular usage operation.
RAM: Kingston ValueRAM DDR3-1600 CL11 4GB @ $47
4GB is could be just sufficient for your magnitude of multitask. Only consider adding more once 4GB is saturated.
GPU: Gigabyte GTX 650 1GB OC @ $150
Empowers BattleField 3 at high on your monitor in its native resolution with adequate fluidity.
HDD: Western Digital Blue 1TB @ $80
Most value, high capacity HDD with top-notch reliability that comes with 3 years warranty.
ODD: Samsung 24X CD/DVD Writer [OEM] @ $21
PSU: FSP Raider 550W [80 Plus Silver] @ $89
Now in upgraded , higher quality internal components and higher efficiency certification and 5 years warranty.
CASE: Cooler Master Elite 311 [USB 3.0] @ $59
With a height of 17.7", this chassis fits perfectly into your PC compartment under your desk, also with all I/O ports facing front on top of chassis for convenient access.
OS: Microsoft Windows 7 Home Premium 64-bit [OEM] @ $115 (Tradepac)
Total: $865
Buy others from Best Buy Computers, #05-21.