Fiber-One and Uncle Sam Cereal are the two best cereals in my opinion. Fiberone is artificially sweetened and tastes great, try mixing with a protein shake for more flavor, less lactose.
I think Uncle Sam cereal mixed with Choco protein powder has a great taste as well, the flax seeds in it give it a great nutty kick. call me crazy but it reminded me of cocoa pebbles.
These cereals are great for almost any diet, subtract grams of fiber per serving and thats the net carbs of the cereal.