Kindly quote price for the below:-

Processor: Intel Core i7 930
Motherboard: Gigabyte EX58A-UD3R
Ram: Kingston DDR3 1333 2GB x 2
Graphic Card: Sapphire ATI HD5850
Power Supply: Cooler Master GX series 550W (is this enough, or too much?, planning to Crossfire & Overclock in future)
Casing: Cooler Master 690 II
Hdd: Western Digital 1 TB/7200/64MB/ SATAII
ROM: Lite-On 24X12X20X/DVD-RAM Sata

Optional:-
Wireless mouse and keyboard combo (no need so canggih, enough for normal gaming can edi, will be sitting 5-10 feet away from PC)