Hello there, So assuming I only want to spend an extra $100 on ONE upgrade, should I go for additional memory (8 Gb) or get the 2.0Ghz i7 Not really a heavy user here, watch youtube videos, movies, browse the internet, edit docs & presentations, maybe a VM with Windows and one day, I may use iMovie... Thoughts? Pros & Cons of one or the other? Anyone faced similar choice? Cheers!