iPad Air 2

It is without doubt the fastest iOS device ever. It has been updated very nicely. It's processor has been updated to A8X from A7. And this time the processor has 3 cores. It is extremely rare but Apple is famous for doing unexpected things. It has a 2 GB RAM as well. So it is a total powerhouse. You won't feel any lag in it even when you use it with iOS 10 two years later. When it comes to looks then what you get is a pleasant surprise. It is just 6.1 mm thick. It's display's resolution is the same but the quality has been improved. The camera is now similar to that of iPhone 6. 8 MP with all the slow motion features. And of course the touch ID. If you are using an iPad Air right now then also I will strongly recommend you to buy it.