Will there be any difference, whatsoever, in terms of frames per second when using Skype on a plastic MacBook with the Intel X3100 GMA versus the aluminum MacBook with the Nvidia integrated graphics? (The reason I ask is this: I am planning on getting two of the exact same computers for myself and my dad so we can video chat with Skype. We'll both be using a top-of-the-line Logitech QuickCam Vision Pro webcam, and we'll both be using a fiber optic Internet connection. My biggest concern in purchasing a computer is running Skype at the highest frames per second rate possible.) Thanks for any and all feedback.