After seeing the improvements included in iOS 11, I would like to replace my 4th gen mini with a 12.9 Pro (which I suspect will also lead to me using my MBP less). I am debating between a used 1st gen 32GB, which look to be selling for about 500-550 or a new 2nd gen 64, which will cost $800. Storage space really isn't an issue for me. The fact that they both have 4GB of RAM and that the 1st gen is already so powerful has me questioning the 250-300 price difference. However, I am also intrigued by the screen upgrades, particularly the 120hz. Any thoughts?