CPU: AMD FX-4100 3.6GHz Quad-Core Processor ($109.99 @ Newegg)
About the same performance as the Phenom.
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($35.98 @ NCIX US)
This is one of the better CPU coolers out there.
Motherboard: ASRock 970 Extreme3 ATX AM3+ Motherboard ($79.99 @ Amazon)
Not a bad board, seems to be one of the best for the money from reviews.
Memory: PNY XLR8 8GB (2 x 4GB) DDR3-1600 Memory ($42.99 @ Newegg)
Nothing to say really.
Video Card: Sapphire Radeon HD 6950 2GB Video Card ($189.99 @ Newegg)
Sapphire is like (almost) the EVGA of AMD, and this card comes with BF3, DiRT3 and has dual fans.
Case: Zalman Z11 Plus ATX Mid Tower Case ($44.99 @ Microcenter)
Since the motherboard doesn't have any front USB 3.0 connectors, this case is perfect as the USB 3.0 ports go to the back of the case, into the motherboard.
Power Supply: PC Power & Cooling 500W ATX12V Power Supply ($55.98 @ NCIX US)
PCP&C modular PSU. Pretty good unit.
Use this build ONLY if you want to risk the MIRs.