I have recently bought a 2010 imac, i find it very fast but am thinking of moving back to laptops as i like using my computer whilst lying on my bed etc. This was my first mac computer and i really like the os so i was thinking of buying a used macbook air maybe 2011 or 2012 sort of age. I have 350-400 budget and I was wondering how this edition of the macbook air would match up to say my current 2010 imac or other brand new laptops for the same price. The main things i am concerned about are the screen resolution and the speed as in will i notice a big difference. I dont really use it for anything major just itunes, web surfing and some game emulators. Also can you share internet connection like the imac. Thank you.