I really only choose the CPU and video card and im not sure on the rest of it. (Budget £800)
CPU Intel Core i5-2500K 3.3GHz Quad-Core
CPU Cooler Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing
Motherboard Gigabyte GA-H61MA-D3V Micro ATX LGA1155
Memory Corsair Vengeance 8GB (2 x 4GB) DDR3-1600
Hard Drive Western Digital Caviar Blue 160GB 3.5" 7200RPM
OCZ Vertex 2 60GB 2.5" SSD
Video Card Sapphire Radeon HD 7970 3GB
Power Supply Antec 620W ATX12V / EPS12V
Optical Drive Samsung SH-B123L/RSBP Blu-Ray Reader, DVD/CD Writer
CPU Intel Core i5-2500K 3.3GHz Quad-Core
CPU Cooler Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing
Motherboard Gigabyte GA-H61MA-D3V Micro ATX LGA1155
Memory Corsair Vengeance 8GB (2 x 4GB) DDR3-1600
Hard Drive Western Digital Caviar Blue 160GB 3.5" 7200RPM
OCZ Vertex 2 60GB 2.5" SSD
Video Card Sapphire Radeon HD 7970 3GB
Power Supply Antec 620W ATX12V / EPS12V
Optical Drive Samsung SH-B123L/RSBP Blu-Ray Reader, DVD/CD Writer