I'm wondering if 4gb will be enough for me.. When returning the laptop I purchased last week I had the cashier put the balance on a gift card instead of back into my account. I'm kicking myself for it now.. Now I have to buy something from best buy. They only have the 4gb option for the macbook air I tend to have 10 - 20 tabs open at a time. It's just the way I am In addition to those tabs I usually have music playing from either itunes or youtube- or a movie streaming from netflix. Will 4gbs be able to handle 10-20 tabs and streaming a movie or video?