In a medium bowl, stir the cream cheese, chili powder, onion, and Monterey Jack cheese. Spread 1/2 cup diced tomatoes with green chilies in a 2-quart shallow baking dish. Spread each cooked noodle with the refried beans and cream cheese mixture. Roll up jelly-roll style and place seam side down in the baking dish. Top with the remaining diced tomatoes with green chilies and cheddar cheese. Cover the dish with foil. Bake at 375 degrees for 40 minutes or until it's hot and bubbling. Sprinkle with the cilantro.