OK, it looks as though my dream to rock up in a few days with an iPhone Plus, and start messing about with Workflows, is at an end.
Financially it makes no sense, we'd like a holiday this year, and other things. So I went for a OnePlus 2: an older model, running on a Cyanogen variant with the potential to not get the Nougat upgrade; but the price, for a high-spec. phone with the big screen I crave, is very attractive.
£250 (around US$315) for this:
http://www.techradar.com/reviews/phones/mobile-phones/oneplus-2-1300253/review
Yes, I know you don't have time to read it. :)