Make the crust: Heat 1/4 cup sugar in medium saucepan on medium heat 4 min. or until melted and golden brown. Remove from heat; toss in cereal. Spread cereal mixture in single layer in baking pan to cool.
Preheat oven to 350ºF. Beat cream cheese and 1/4 of the cup sugar in large bowl with electric mixer on medium speed until well blended. Add dulce de leche and sour cream; mix well. Add eggs, one at a time, mixing on low speed after each addition just until blended. Pour into 9-inch springform pan.
Bake 50 to 55 min. or until center is almost set. Run knife or metal spatula around side of pan to loosen cake; cool before removing side of pan. Refrigerate 4 hours or overnight.
Top with dulce de leche just before serving.