I am using an iPad 4 retina 16 gig with a keyboard case currently to take notes in class (I use it half the time with the other half I use my lenovo) and for YouTube/web browsing. The storage is small but I put everything on OneDrive. However I do most of my heavy work on my lenovo. The iPad Air 2 is now a bit cheaper and I am on the fence about upgrading. I think part of the reason is that it's already 2 years old and the iPad pro is out of my price range. Is the upgrade worth it in your opinion? Or should I wait an extra year until after iOS 10?