I wrote the new beginning as something of an experiment--a way to get a clearer picture of what came before. Now I'm thinking it might do better as the start of things as a more detailed way of setting the scene. But I've gotten so used to the notion of the book beginning where I first began it that I'm reluctant to throw it away completely. So right now I have two different Chapter Ones saved in Scrivener and I'll be figuring out which one works best as I go.
I must say that the new opening seems to have refreshed my interest in working on it.