Peel and devein shrimp; reserve shells. Halve shrimp lengthwise. Transfer shrimp to small bowl. Cover and chill. Combine reserved shrimp shells, broth and next 4 ingredients in large pot. Bring to boil. Reduce heat; simmer uncovered 20 minutes to blend flavors, stirring and skimming surface occasionally. (Can be made 1 day ahead. Cover; chill.) Strain broth into large bowl, pressing on solids with back of spoon to release as much liquid as possible; discard solids. Return broth to pot. Bring to simmer. Remove from heat. Add shrimp, herbs, chili and lime juice. Cover and let stand until shrimp are opaque, stirring once, about 2 minutes. Ladle into bowls. Garnish with lime.