I have a 2011 MBP I'm considering selling for a MBA. I want something a bit lighter and compact. I know the difference of i5 and i7 in the PC world is multithreading; unless you're using applications that can take advantage of multithreading for video or photo editing then i7 is overkill. Can I assume this is the same for the MBA? I've seen a speed comparison of the i5 2011 and 2012 and there is a noticeable speed difference, but the $1200 is out of my price range for the newer model. (The 11" is too small for me.) I have found i7 2011 models for about $1000 so I'm wondering that if multithreading isn't the only factor, will an i7 2011 model be similar in speed to an i5 2012 model?