My SO got me a 100$ gift certificate to a local camera store and i am not sure what i should get. I was thinking of getting the 420 ex and forking over an extra 100$ or getting some filters. I take most of my pics outdoors, so i am leaning towards filters(for 70-200 f/4L), but i don't know which ones to get. What would you reccomend(circular polarizer, neutral density etc)? If you have any other suggestions of what i should get for 200$ then that would be great too. Thanks.