Preheat oven to 250 degrees. Lightly grease two baking pans; set aside.In a large bowl, combine popcorn and mixed nuts.In a medium saucepan melt butter. Add brown sugar, honey and salt; bring to a boil while stirring constantly. Boil for about 5 minutes, stirring occasionally. Stir in vanilla.Quickly (but carefully) pour sugar mixture over popcorn mixture and stir with a wooden spoon until well coated.Spread mixture in a single layer on baking pans. Put in the oven and bake for 30 minutes. Meanwhile, melt chocolates separately in a double boiler or in the microwave.Take baking pans out of the oven and place on wire racks to cool. Drizzle melted chocolate over popcorn mixture. To make it easy to drizzle the chocolate, pour chocolate into a ziploc bag, put on some gloves, cut one of the corners, and lightly squeeze the bag.Cool until chocolate hardens. Break apart and store in an airtight container.