Prepare pasta according to package directions; drain. Meanwhile, in medium skillet over medium-high heat, sauté bacon until crisp; remove to paper towels.
Add cheese, milk and 2 tablespoons butter to cooked pasta; salt and pepper to taste. Cook over low heat, stirring frequently, until cheese is melted.
Stir in bacon and tomatoes; transfer to a greased 2-quart baking dish. In small microwave-safe bowl, melt remaining 2 tablespoons butter. Add bread crumbs and toss to coat. Sprinkle over macaroni.
Bake in a preheated 375°F oven 20-25 minutes or until bubbly and golden brown.