Hey guys, After spending the whole weekend staining furniture and re-doing my house. I have decided an iMac is whats needed for my bedroom. So the MBP is going back and I am going to pick up a 24" iMac. Now, I have to get it at Best Buy because thats where the MBP is getting returned too. My question is I think they only have the models with the Nvidia graphics that have 256MB. Will this hinder my gaming? I boot into Windows 7 to play L4D all the time. My MBP can run it at everything set to high(shaders medium). I just need some advice to get the same machine in iMac form.