I'm thinking about purchasing the upcoming new Macbooks if the rumor about the inclusion of an nVidia chipset is true. However, I have a question: I currently have a notebook with a Mobility Radeon X600. How would that compare against these new nVidia chipsets? I also have a Geforce 7600 GT in my desktop. How does that compare against the new chipsets? Does anyone know how I can find that information out? Even generic notebook comparisons with the nVidia chips would be helpful. Thanks!