I'm going to pick up an iPad Pro sometime this year, and I'm debating over the sizes. My two main uses are annotations on documents, and reading things - comics, articles, novels, etc., The other thing, though, is that I use public transit regularly. I used to have an iPad 2 before, and I often used it during my trips for reading or games. Half the time, I felt the size was just right, and during the other half, I felt it was not big enough. Which size would you recommend?