My advice: Start a new thread. This one has gone way off-topic, you probably won’t get much help here anymore. Get a clean slate with a new thread and specify your budget, needs and uses. Don’t mind the brand of the camera, until you get to search for lenses that are useful for your needs and uses.
Of the four cameras you mentioned now, my personal favorite is the D5500, but that shouldn’t mean much to you. You should also look around for other cameras that may work well for you, some would be smaller and lighter, and have matching lenses that are also smaller and lighter, without any sacrifices. Again, though, that largely depends on your budget, needs and potential uses of the camera, so define those better and I’m sure we can all be of better assistance to you.