We've looked into the double oven ranges, it doesn't seem like a good option for me because I have a bad back and the lower oven door opens flat on the floor. I just don't think that would be practical for me. I would use both ovens a lot, I think. I would guess a couple times a month. I complain about not having enough oven space at least that often.
We're doing a complete gut of our kitchen and taking down walls so it will be a completely new layout. One of the cabinet designers suggested a range and a single wall oven. It still takes up a lot of space, but it would be cheaper than a cooktop and double oven.