Use the stock fan and a source 210 elite case, switch to w7 hp 64-bit and add a 2TB hdd
PCPartPicker part list:
http://pcpartpicker.com/p/2TQeL
Price breakdown by merchant: http://pcpartpicker.com/p/2TQeL/by_merchant/
Benchmarks: http://pcpartpicker.com/p/2TQeL/benchmarks/
CPU: AMD FX-6300 3.5GHz 6-Core Processor ($109.99 @ Newegg)
Motherboard: ASRock 970 Extreme3 R2.0 ATX AM3+ Motherboard ($69.99 @ Microcenter)
Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-2133 Memory ($84.99 @ Newegg)
Storage: Seagate Barracuda 2TB 3.5" 7200RPM Internal Hard Drive ($87.96 @ Amazon)
Video Card: Asus Radeon HD 7790 2GB Video Card ($144.98 @ SuperBiiz)
Case: NZXT Source 210 Elite (Black) ATX Mid Tower Case ($42.98 @ Best Buy)
Power Supply: Corsair CX 500W 80+ Bronze Certified Semi-Modular ATX Power Supply ($39.99 @ Newegg)
Optical Drive: Asus DRW-24B1ST/BLK/B/AS DVD/CD Writer ($19.99 @ Microcenter)
Operating System: Microsoft Windows 7 Home Premium SP1 (OEM) (64-bit) ($89.98 @ OutletPC)
Total: $690.85
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-02-15 18:07 EST-0500)