Hi, I have 2 computers. One of them has an AMD Athlon 64 processor (Not 64 Bit) and the other one has an Intel Core 2 Duo. They both are Dell Dimensions and have 2 GB of RAM. I want to use the better performance one for light web browsing and YouTube. Which one is better? Or which one would you use? i was thinking about keeping Windows XP on there, or upgrade to Windows Vista or Windows 7. Maybe even Windows 8 just to see. Thanks!