Two years ago I switched from an old electric to a Capital Culinarian gas range (I don't believe they make a dual fuel). Love the power of the stove -- each burner is 23,000 BTUs and the burner design is terrific. I paid about $4gs for it two years ago. I'm quite happy with the oven too, but taken me a long time to figure out how to bake breads in a gas oven. (By the way, if you like baking pizzas, it's fantastic).
That said, if I were to do it again, I would probably do a Capital Culinarian stovetop and a separate electric convection oven. I've heard too many discouraging words about dual fuel ranges -- and it makes sense to me to get a great stovetop and a great oven -- and if down the line, one needs replacing or repairing, you are only dealing with the one unit.