A good burger in Tucson can be rare, according to Caliente readers. • They also like them medium rare, well done, with different types of cheeses, on different types of bread and with a variety of toppings, including ketchup, mayo, mushrooms, lettuce, bacon and guacamole. • Hundreds of Tucsonans participated in Caliente's 2013 Burger Battle by sounding off through Facebook and by email about who makes the best burgers in town. • The result was a long list of top-notch burger joints located across the city. • Fan favorites can be found Pages 24, 25 and 28.