Place bread cubes in a lightly greased 9x13 baking pan. In a large bowl, beat cream cheese with an electric mixer at medium speed until smooth. Add eggs one at a time, mixing well after each addition. Stir in milk, half and half, maple syrup, and vanilla until mixture is smooth. Pour cream cheese mixture over bread; cover, and refrigerate overnight. The next morning, remove soufflé from fridge and let stand at room temperature for 30 minutes. Meanwhile, preheat over to 375F. Bake, uncovered, for 30 minutes in the preheated oven, or until a knife inserted in the center comes out clean. Sprinkle with confectioners sugar, and serve warm.