Cook macaroni according to the package directions. Drain.
In a saucepan, melt butter or margarine over medium heat. Stir in enough flour to make a roux. Add milk to roux slowly, stirring constantly. Stir in cheeses, and cook over low heat until cheese is melted and the sauce is a little thick. Put macaroni in large casserole dish, and pour sauce over macaroni. Stir well. Add 2 tablespoons of White Truffle Oil, and stir well.
Melt butter or margarine in a skillet over medium heat. Add bread crumbs and brown. Spread over the macaroni and cheese to cover. Sprinkle with a little paprika.