Hey guys! I wanna ask you for some help, because I do not really know which would be better for my long-term plan 1. 15' macbook pro i7 2.8 ghz 4gb ram -> +180$ 2. 15' macbook pro i7 2,66 ghz 8gb ram -> +360$ I would like to ask you if I can buy RAM cheaper? Or it is only available at Apple? So if I buy the 1. option, then when I want to replace the existing 4gb ram for 8gb ram do i have to buy it at apple? Any suggestions? Thanks!