My main uses for a home computer are Safari browsing, iTunes, and YouTube videos. Also CPA Exam prep materials that run on my current Mac. I got a 2012 MBP (non-retina). I bought an iPad Air when it first came out but I don't like browsing with that big screen using my fingers as I prefer the mouse and keys. I'm mainly interested in this thing being very light and a long battery life. Do you think this thing is good for my uses? I really wanna know if this thing can handle so much YouTube viewing. Thanks!