I suggest this. Also, dont bother with a big moniter as this computer is only for hosting the server?
PCPartPicker part list:
http://pcpartpicker.com/p/DBfY
Price breakdown by merchant: http://pcpartpicker.com/p/DBfY/by_merchant/
Benchmarks: http://pcpartpicker.com/p/DBfY/benchmarks/
CPU: Intel Xeon E3-1230 V2 3.3GHz Quad-Core Processor ($233.98 @ SuperBiiz)
Motherboard: ASRock Z77 Extreme4 ATX LGA1155 Motherboard ($129.99 @ Microcenter)
Memory: Corsair Vengeance 16GB (2 x 8GB) DDR3-1600 Memory ($79.99 @ Amazon)
Storage: Seagate Barracuda 2TB 3.5" 7200RPM Internal Hard Drive ($99.98 @ Outlet PC)
Video Card: MSI Radeon HD 7770 1GB Video Card ($99.99 @ Newegg)
Case: Cooler Master HAF 912 ATX Mid Tower Case ($56.21 @ TigerDirect)
Power Supply: Corsair Builder 500W 80 PLUS Bronze Certified ATX12V Power Supply ($49.99 @ Newegg)
Total: $750.13
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-02-14 21:18 EST-0500)