I needed some help deciding between the two 15" model Macbook Pros. I feel that for most of my interests, the baseline Macbook Pro would be just fine. However, I do feel that I will want to play games on the Windows side. THe games I would play would be those found on PS2 and XBox 360. I would only play games from time to time, but I want really good graphics (detail, no skipping, etc). Do I need the upgraded graphics card? If possible, i want to save money. Thanks!