i guess Gorditas, since I don't even know what a Sopes is. Although I've been on a chicken/cheese quesadilla kick recently.
"Mexican" food is kind of weird--you can go spend 5-6 bucks at Taco Bell, or go to El Dorado/Loco/Peco/Rojo/whatever and get the same stuff, more of it, served to you with free chips and salsa, for about the same price, and about the same speed [almost every Mexican restaurant I've been to delivers the food really quickly.]