Agreed that the AMD configuration is not the best, it was a rough draft, done late at night.
A better Pentium based system is proposed below. Excludes case. Motherboard chosen allows for future expansion and overclocking. Suggested 2 x 8 GB DIMM's in dual channel configuration, but could downgrade if necessary to 2 x 4 GB DIMM's.
PCPartPicker part list:
http://au.pcpartpicker.com/p/nLk6Lk
Price breakdown by merchant: http://au.pcpartpicker.com/p/nLk6Lk/by_merchant/
CPU: Intel Pentium G3450 3.4GHz Dual-Core Processor ($98.00 @ CPL Online)
Motherboard: ASRock Z97 Anniversary ATX LGA1150 Motherboard ($119.00 @ CPL Online)
Memory: Kingston Fury Series 16GB (2 x 8GB) DDR3-1600 Memory ($188.00 @ IJK)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($67.00 @ CPL Online)
Video Card: Asus Radeon R9 270 2GB DirectCU II Video Card ($205.00 @ CPL Online)
Power Supply: Antec High Current Gamer 520W 80+ Bronze Certified ATX Power Supply ($89.00 @ Mwave Australia)
Operating System: Microsoft Windows 8.1 (OEM) (64-bit) ($119.00 @ Mwave Australia)
Total: $885.00
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-01-12 16:00 EST+1100