Right about 2 months ago my 2010 Macbook pro died due to motherboard failure, ive been making do with a cheap laptop but now want a new one. I want to run Logic + I have a fair few more pluggins(all legal). As well as running typical office apps, internet, uttorrent, imessage etc however I dont want to be shutting apps all the time. I guess what i'm wondering is would people go for a 13"/512gb/16gb or a 15"/256gb/8gb? Storage space and screen size is not a major issue for me but its more the extra ram vs quad core thing im curious about.