I read a study about whether gas or electric is more efficient, conventional wisdom is that they're about the same and it's a matter of preference, but the study found that gas is more efficient for the stove top while electric is more efficient for the oven. To get the best of both a dual fuel range would work best.
you have to figure out which is more important to you. keeping costs down or features. if cost, you can buy a 30" electric as cheap as $400. if features, dual fuel is great as is the induction if you want to stay electric. with induction though you'll need proper pans. if you do a lot of cooking and have the counter space i'd go duel fuel and buy a separate induction burner[they have single units that sit on counter top].