After reading the thread, it appears that Susannah is more of a shutterbug that some might give her credit to be. She has specific complaints about over and under exposure that will only be corrected by adjustable cameras, not point and shoots (although +/- compensation can do the trick).
I also think that either the D5100 or D7000 will work for her, but the D7000 will offer more lens choices. What I might suggest, is stay with the D5100 and wait to see what might happen with the D7000 replacement.
I notice that Susannah is in Indiana, and attending some of the Nikon classes could be fun (for anyone) who might be interested in learning more about the cameras and how to use them. I've done it more than once over the years, in more than one location, and found it worthwhile.