Budget micro-ATX for fun!

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: AMD FX-6300 3.5GHz 6-Core Processor ($116.97 @ OutletPC)
Motherboard: Gigabyte GA-78LMT-USB3 Micro ATX AM3+ Motherboard ($49.99 @ Microcenter)
Memory: A-Data XPG V1.0 8GB (2 x 4GB) DDR3-1600 Memory ($72.99 @ Newegg)
Storage: Seagate Barracuda 500GB 3.5" 7200RPM Internal Hard Drive ($47.00 @ Amazon)
Video Card: PowerColor Radeon HD 7850 2GB Video Card ($119.99 @ Newegg)
Case: Xigmatek Aeos MicroATX Mid Tower Case ($24.99 @ Newegg)
Power Supply: Antec 450W ATX Power Supply ($34.99 @ NCIX US)
Optical Drive: LG GH24NSB0 DVD/CD Writer ($14.99 @ Newegg)
Total: $481.91
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-02-03 02:12 EST-0500)

Significantly better for gaming. MUCH better PSU.
 
Solution

Vic 40

Titan
Ambassador
Something else,

PCPartPicker part list

CPU: AMD FX-4300 3.8GHz Quad-Core Processor ($99.99 @ Amazon)
Motherboard: Gigabyte GA-78LMT-USB3 Micro ATX AM3+ Motherboard ($49.99 @ Microcenter)
Memory: A-Data XPG V1.0 8GB (2 x 4GB) DDR3-1600 Memory ($72.99 @ Newegg)
Storage: Western Digital Caviar Blue 320GB 3.5" 7200RPM Internal Hard Drive ($35.99 @ Amazon)
Video Card: Asus GeForce GTX 660 2GB Video Card ($169.99 @ Newegg)
Case: Xion XON-560 MicroATX Mini Tower Case ($29.99 @ Newegg)
Power Supply: Corsair Builder 430W 80+ Bronze Certified ATX Power Supply ($19.99 @ Microcenter)
Optical Drive: Asus DRW-24B1ST/BLK/B/AS DVD/CD Writer ($19.98 @ OutletPC)
Total: $498.91
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-02-03 08:48 EST-0500)