Is this a good budget gaming pc?

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: AMD FX-8320 3.5GHz 8-Core Processor ($139.99 @ Amazon)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($29.98 @ OutletPC)
Motherboard: Gigabyte GA-970A-UD3P ATX AM3+ Motherboard ($77.98 @ Newegg)
Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-2133 Memory ($79.99 @ Newegg)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($55.99 @ NCIX US)
Video Card: XFX Radeon R9 280X 3GB Double Dissipation Video Card ($259.99 @ Newegg)
Case: Corsair 200R ATX Mid Tower Case ($39.99 @ Newegg)
Power Supply: XFX 650W 80+ Bronze Certified Semi-Modular ATX Power Supply ($95.99 @ Mwave)
Operating System: Microsoft Windows 8 (OEM) (64-bit)
Total: $767.90
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-06-05 08:26 EDT-0400)
 
Solution
Another weaker option if the base price is still too expensive :
PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: AMD FX-6300 3.5GHz 6-Core Processor ($119.99 @ Newegg)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($29.98 @ OutletPC)
Motherboard: Gigabyte GA-970A-UD3P ATX AM3+ Motherboard ($77.98 @ Newegg)
Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-2133 Memory ($79.99 @ Newegg)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($55.99 @ NCIX US)
Video Card: XFX Radeon R9 280 3GB Double Dissipation Video Card ($199.99 @ Newegg)
Case: Corsair 200R ATX Mid Tower Case ($39.99 @ Newegg)
Power Supply: XFX 650W 80+ Bronze Certified Semi-Modular ATX Power Supply ($95.99 @ Mwave)
Operating System: Microsoft Windows 8.1 (OEM) (64-bit) ($89.98 @ OutletPC)
Total: $768.88
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-06-05 08:27 EDT-0400)