Custom help of computer game?

Lately I've been working on a custom made computer. I was in Ibuypower.com and found some interesting computers. I have been asking questions of some help to custom make. I was hoping to pay 600 or less (us $ $ $) prior to shipping and handling. I was hoping if someone can send me a link to a custom made computer that can run COD WAW, Halo2, and Crysis. Please help me. Thank you.

Specifications: CPU: Phenom 955BE 3.2GHzx4, MOBO: Asus M4A79T Deluxe 790FX, RAM: 4 GB DDR3 OCZ Platinum PC12800, Videocards: 1 XFX GeForce 4890 Xtreme GDDR5 1, PSU: 850W modular Sigma, COOL: I use a spirit Gelid for CPU, HDD: 1 Seagate 1TB 7200.11 custom built by me for less than $ 1,000. And he eats the computer that first guy posted.

Broken IBUYPOWER laptop part 2