Hmmm...I don't eat cereal much, but I suppose Grape Nuts would be a pretty good choice. If you can stomach the stuff oatmeal would probably also be good. Personally I can't stand oatmeal as cereal but it's versatile (great for bread, cookies, filler for meatloaf, etc).

Again, not a big cereal guy but Cream of Wheat is one I like. It would probably keep pretty well if you keep it dry.
_________________________
“I'd rather have questions that cannot be answered than answers that can't be questioned.” —Richard Feynman