Help Me Build My New Gaming Computer

I don't know what kind of computer case I should get. That is cheap and affordable. I will be able to play Combat Arms on HIGHEST quality and MW2 on pretty high as well. I'm getting the NVIDIA GeForce GTX 460 - 1GB Graphic Card and the ASUS M4A785-M -- AMD 785G Hybrid CrossFire Chipset Motherboard, will a Standard 600W power supply be enough to supply to all that and a mouse and a 19" Monitor?

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Princeton Digital VL1918 19 LCD Monitor Black    US $1.54

ViewSonic VP 920B 19 LCD Monitor Black Used but in Great Condition    US $.99

Lenovo ThinkVision L1900P 19 LCD Monitor Black    US $16.05

Dell 1907FPC 19 LCD Monitor Black    US $20.50

LK HUGE Dell 19 LCD Widescreen Monitor E198WFP Black    US $.99

Used eMachines E182HL 19 Widescreen LED LCD Monitor Black    US $21.00