I am currently looking into getting a custom built pc for World at War 

I would probably have to have it prebuilt as I have built one from the ground up. I would say my max price range would be $900ish

I've been looking into it and I think I might just get a new computer. What would you guys' recommend for a desktop stats wise for me? I'm not a super hardcore gamer but I do want to play custom maps smoothly like a console and I want to move into mapping as well

Thank you all I will start getting this stuff

Yes it does

2 gb RAM

500 GB HDD

Intel Pentium Dual Core Processor E2180

NVidia GeForce 7100 graphics card

Windows Vista

I know this might make a noob but I am having trouble getting World at War to work properly on my PC without a lot of lag so I can play custom zombie maps and eventually make new maps. Can anyone help with this?