Afternoon All!

Well I was speaking to Andy P about going to the Leuchars airshow in a couple of weeks, and was looking for some advice about shooting. He said, like I thought was the case, i'd see better results with a better lens. So any reviews or advice on a new lens. I'd say top budget of about £200 which I know also narrows down what I can get. I've got a Canon EOS 500D.

Thanks in advance!