Here's my setup, put together in February 2012:
GPU: Asus Radeon HD 6950 2GB DirectCU II @ 870/5300 MHz (1536 Shaders)
CPU: Intel Core i5 2500K Sandy Bridge Quad-Core @ 4.0 GHz
CPU Cooler: Cooler Master Hyper 212 EVO
Mobo: Asus P8Z68-V LE, Intel Z68 Chipset, UEFI
RAM: Corsair Vengeance 8GB Low Profile 1600 MHz DDR3 @ 9-9-9-24 CR T1
HDD: Western Digital Caviar Black 1TB, 7200 RPM, 64MB Cache, SATA 6GB/s
Sound Card: Creative SB X-Fi Xtreme Gamer, 7.1 Channels
Case: Cooler Master HAF 912 Plus
DVD-RW: Asus DRW-24B3ST, SATA
Front Fan: Cooler Master MegaFlow 200mm
Top Fan: Cooler Master MegaFlow 200mm @ 500 RPM (Zalman Fan Mate 2)
Rear Fan: Scythe Gentle Typhoon AP-13 120mm
PSU: Seasonic X-Series X-660, 80 PLUS Gold Certified
Monitor: Dell 24" UltraSharp U2412M, 5ms G2G @ 1920x1200
Mouse: Logitech G400
Keyboard: Logitech G110
Headphones: Sennheiser HD 555