My brother bought several of these to run as his servers for his Android games:
Motherboard: GIGABYTE GA-Z68XP-UD3P LGA 1155 Intel Z68 HDMI SATA 6Gb/s USB 3.0 ATX
Power Supply: CORSAIR Enthusiast Series CMPSU-850TX 850W ATX12V v2.2
CPU: Intel Core i7-2600K Sandy Bridge 3.4GHz (3.8GHz Turbo Boost) 4 x 256KB L2 Cache 8MB L3 Cache LGA 1155 95W Quad-Core
16gb RAM: G.SKILL Ripjaws Series 16GB (4 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600
15,000 RPM SAS Drive: HITACHI Ultrastar 600GB 15000 RPM 64MB Cache SAS 6Gb/s
Fairly standard, I think...save for the beefy insane harddrives.