Hi all. My macbook ( 2.1 core2duo 4 gb ram, mid 2008) is getting quite slow. If I buy a new mbp 13", Is it much, much faster then my old one? With that I mean a difference as in day and night? ( If someone suggests an other model RMBP > To expensive and if I read along the forum it has some bugs MBA > "only max I7 2.0 ghz CPU, but standard SDD.. But lot of people say that the screen is not as good as in viewing angels and colors are not as good as the 13 MBP... I use it mostly with aperture for photo editing and the stadard things: Internet and word/excel I wil get 8gb ram anyway. But do you suggest the i5 2.5 or the i7 2.9? is it worth the extra money?