While I would love to move up to the 10.5 IPP, it's hard to justify the price given my usage, using my iPad primarily for web pages, reading books, and using OnSong. But for some sluggishness, the Air 1 still works fairly well for me. (I do most of my real work on a 2012 MacBook Pro retina.) So the 2017 iPad would be a significant jump over the Air 1, but with the 9.7 IPP's dropping in price, I wonder if that may be a better choice, particularly concerning the display. A 128GB iPad 2017 is priced at $400 at Costco, and the 128GB 9.7 Pro is $525 through tomorrow, after which it returns to $575. Any advice? Given the choice of a iPad 2017 or 9.7 IPP, which would you advise? Thanks much.