I used to have an iPad 3, then I got a retina mini this year. Though I love the lightweight, I don't take it out with me as I have my iPod touch when I go out. So my iPad stays home pretty much all the time. How much lighter is an iPad Air compared to iPad 3? I don't know if I should get an Air next time, but I might end up not liking the weight of it. I'd appreciate opinions from people who have / had both and chose one over another.