I'm getting my first Macbook ever but having some trouble deciding between which macbook air to get. I'm having the following options: 1) Refurbished air 13 inch 2011: 256G SSD but has only 4G ram and out of dated processor/USB ports 2) Air 2012 with 8G Ram and 256SSD: this is my ideal laptop but it is $400 more expensive. My main work would be programming in both mac/windows/linux (therefore 256G is a must) and do a lot of data mining for research. Is 4G Ram would be enough or I need to go for 8G ram? Actually I just got the first option, the computer is really nice but it gets hot very easily and the fan is noisy. Is the 2012 one is quieter somehow? I'm in the 14 days window, so if that's necessary I'll return the 2011 one and get the 2012.