I'm planning to buy a macbook air for: - presentations (word, excel, powerpoint) - lots of songs and photos (2k or more) - research & social networking sites + youtube (10-15 tabs open) - apps (not much) - files and documents - light video editing (3-5 mins of video only) Will the 4GB RAM and 128 SSD enough for those? Or should I upgrade? What should I upgrade then? Please help I don't want any regrets. Or should I buy the Macbook Pro instead?