So thinking of buying an imac 27. But i really don't know if i should pick I7 or I5 ?! I will make movies, play some steam games, music make and photoshop... Think i will upgrade with 2*4 Gb ram so I get totall 12 Gb ram but I5 vs I7 I have no idea, I7 is better i know but I5 is much cheaper! So I need some help!