Depends, everyday tasks. Just iLife stuffs here and there. I was more concerned of price-
55$ for 2 4gb 1600 from crucial vs 120$ 16gb corsair from amazon
Im more likely to get the 8gb, but if there is a wide difference in performance I can get the 16gb. Tho I'm confused since I noticed the performance jump on using the ssd vs hdd and I don't know if I can still notice the performance if I upgrade to 16gb on this machine.
8 GB would suit you fine then. 8 would be more than enough for your needs, honestly. You won't notice the night and day difference of going from an HDD to SDD, but you'll be able to do more multitasking.