Hi, I plan on buying a MBP. I also plan to connect it to a 30'' ACD. I am not sure which configuration of MBP to get to run this giant display. Note that I don't plan on running any professional applications. Just Mail, iWork, Microsoft Office, and iTunes (all running at the same time). But my most important application is SAFARI. I love to have lots and lots of open tabs and videos running. Smooth streaming video is priority one. as well as SMOOTH 1080p video. Given this information, if I connect my MBP to a 30'' display, will I need 128mb of VRAM or 256mb of VRAM? What are the effects of VRAM or lack thereof (sp?)? What is VRAM???? Thanks!