Hello, I just purchased a refurbished 2011 Macbook Air 4GB / 128GB off of Apple for $869. I feel like I got a pretty good deal! My workload is not very heavy and I have other options for storage. However, my mind would be at ease if the computer has 8GB. Like I said, my workload is not heavy but I do a lot of multitasking. Is the deal I got too good to pass up? Is there a cheap alternative online if I'm looking for a 2011 8GB / 128GB? Lastly, I don't think the difference from 2011 to 2012 would be noticeable for someone like me. Is that true? Thanks for all of your help!