PCPartPicker part list:
http://pcpartpicker.com/p/2ECHU
Price breakdown by merchant: http://pcpartpicker.com/p/2ECHU/by_merchant/
Benchmarks: http://pcpartpicker.com/p/2ECHU/benchmarks/
CPU: AMD FX-8320 3.5GHz 8-Core Processor ($134.99 @ TigerDirect)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($34.98 @ SuperBiiz)
Motherboard: ASRock 970 EXTREME4 ATX AM3+ Motherboard ($99.49 @ Newegg)
Memory: G.Skill Ares Series 8GB (2 x 4GB) DDR3-1866 Memory ($72.25 @ Newegg)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($59.99 @ Amazon)
Video Card: Gigabyte GeForce GTX 760 2GB Video Card ($249.99 @ NCIX US)
Wireless Network Adapter: TP-Link TL-WDN4800 802.11a/b/g/n PCI-Express x1 Wi-Fi Adapter ($42.92 @ Newegg)
Case: Thermaltake VL80001W2Z ATX Mid Tower Case ($39.99 @ Amazon)
Power Supply: Corsair Builder 600W 80+ Bronze Certified ATX Power Supply ($59.99 @ Newegg)
Optical Drive: Asus DVD-E818AAT/BLK/B/GEN DVD/CD Drive ($18.99 @ Newegg)
Operating System: Microsoft Windows 8.1 - OEM (64-bit) ($94.98 @ OutletPC)
Total: $908.56
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-01-20 17:34 EST-0500)
Personally, if i was in your situation I'd build this.
-Better RAM
-Better motherboard
-Better cooling for GPU
-More reliable power supply
-Better wireless card
-Windows 8.1 is proven faster in gaming and everyday applications
*Also, the BIOS update is very simple. Just youtube it and you'll find multiple videos on exactly how.