An SSD is nice but it wont increase your FPS in games, you can always add it later. Here's a build in that price range.
PCPartPicker part list:
http://pcpartpicker.com/p/16t1m
Price breakdown by merchant: http://pcpartpicker.com/p/16t1m/by_merchant/
Benchmarks: http://pcpartpicker.com/p/16t1m/benchmarks/
CPU: AMD FX-6300 3.5GHz 6-Core Processor ($119.99 @ Amazon)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($33.24 @ Amazon)
Motherboard: Asus M5A97 LE R2.0 ATX AM3+ Motherboard ($68.99 @ Amazon)
Memory: Kingston Black Series 8GB (2 x 4GB) DDR3-1600 Memory ($53.99 @ Newegg)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($65.67 @ Amazon)
Video Card: Sapphire Radeon HD 7870 GHz Edition 2GB Video Card ($214.99 @ Newegg)
Case: Cooler Master Elite 430 ATX Mid Tower Case ($39.99 @ Newegg)
Power Supply: Corsair CX 500W 80 PLUS Bronze Certified ATX12V Power Supply ($54.99 @ Amazon)
Operating System: Microsoft Windows 7 Home Premium SP1 (OEM) (64-bit) ($90.91 @ Amazon)
Total: $742.76
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-06-14 19:19 EDT-0400)