Im in the exact same situation. I have the Ipad air 1 but Ive been using it less and less. I usually use it when laying down on my bed or the couch and its not really comfortable to use. Whether im typing or just browsing internet, i cant hold it up with one hand or type with two hands easily. I have pretty big hands too and I still feel some discomfort. Im considering a mini the next time I upgrade. A bigger screen isnt really a big deal to me either.
Only thing I dont like is that the mini 4 is less powerful than the Air 2, I may just wait for the mini 5 next fall lol