Good action plan. Go with the iPhone Pro Max model.That battery life alone >>>
I tried out the 12 Pro and went back to the 12 Pro Max. Last year I actually stuck with the 13 Pro and it served me well, but I miss the battery life the of the Pro Max. Going back to the Pro Max this year. I hate how heavy these phones feel in my hands, but a MagSafe pop socket should help with that.