Need help with laptop buy

I was thinking about getting a laptop but since i dont have much money, i don't want to buy one of those cheap ones and not be able to play my favorite game. so what would be the minimum cpu/gpu requirements to play counter-strike source? I would also appeciate it if anyone could tell me a good place to buy a cheap computer with requirements like that. Thanks in advance for your help.

Oh yeah i thought i forgot something. I only have around $600 and i live in nj, usa.
Edit-
oh heres the system requirements for the game


Minimum: 1.2 GHz Processor, 256MB RAM, DirectX 7 level graphics card, Windows 2000/XP/ME/98, Mouse, Keyboard, Internet Connection

Recommended: 2.4 GHz Processor, 512MB RAM, DirectX 9 level graphics card, Windows 2000/XP, Mouse, Keyboard, Internet Connection