Ok, so I have the Alum 2.4 Ghz MBP and I want to max out the amount of ram it holds. It already has 2gigs and I've heard that it can hold a max of 4gigs () And was wondering is it worth upgrading just 2gigs? Will there be a difference is speeds? I also plan on buying SL while I am at it. Yes I am in the upgrade performance mood for my MBP. And unlike a PC you can't really improve the performance to much other than the ram... Also, can I buy some ram on newegg or does it have to be the overpriced Apple ram? Also can I mix ram types? Since it already has 2gigs can I just buy 2 more gigs of a diff brand but same type? Thanks!