Searching Mroogle, it would seem 1600MHz RAM DOES work in the latest i7 MacBook Pros. However, I'm having difficult finding comparisons of the two RAM speeds. That, and I can't find anyone that sells the 1600MHz RAM (living in Canada might be a reason for that). Anyway, what speed would you recommend going with? And to be more specific, what brand would you go with? Before anyone asks, I use Logic Studio and EWQL Libraries, which is very intensive on the CPU and RAM on my Mac Pro.