Normally I would say pizza, particularly one with meat, like buffalo chicken.
I would spend about four us dollars, maybe get a coke. Where as if I were to buy chocolate and spend the same amount I might get two pieces and a drink.
Pizza is a bit healthier, with the meat and minus the cheese (I nearly always rid myself of that processed stuff) unless you have some problems with your blood and we're dealing with dark chocolate.
Where then, I would really only favor chocolate if it were rich dark Godiva chocolate, or this amazing chocolate cake actually titled on the menu "Black-a** Cake."