Hi, excuse my ignorance.... I have a mid 2010 MBP (15" 2.4ghz, etc.) and I'm ready to upgrade my ram, but I have a few questions. 1. Is their a particular brand that you recommend? I know the apple brand ram is too expensive. 2. Since I have 4gb of ram, can I just buy another 4gb or do I have to buy an entirely new 8gb? 3. Is 8gb my limit? Thanks. The most intensive programs I run are logic and pro-tools but both these programs tend to crash on me in the middle of a session, so I'm trying to remedy that. I also intend on installing a 7200rpm drive to improve the computers performance. Thanks!