I have decided on the new $999 11in Air and I've budgeted myself one upgrade, either going up to a 128GB SSD or 8GB of RAM. I'm having trouble deciding. I mainly plan on using the Air for MS Office, surfing the web, and some gaming. Would it be better to go with the hard drive or RAM? I have another computer at home for photos, music, movies, etc. I'm leaning towards getting more RAM but would I really need the 8gb verses 4gb? Thanks!