A little background: I had an iPad 2 since 2011 and sold it this August in hopes to pick up a new iPad. I got an Air 2 for myself and I'm loving the speed. Today I picked up a iPad mini 2 to determine which I like better (Air 2 or Mini 2). Mini 2 came with 7.1.2. For you folks with 8.1 on Mini 2, what do you suggest? Keep Mini 2 on 7.1.2 or upgrade to 8.1? Much Appreciated!