Canon 55-250mm lens

canon400d

Hi there everyone, I was looking for another general purpose lens. I have read quite a lot of good reviews on the 55-250mm and was very impressed indeed, especially the price. However, I have been using my kit lens 17-85 with my 40D and I was really thinking about going for a 24-105 for an every day knock about. But wow the price difference. Is it worth the difference. This is really why I am asking. I do know if I go to a 5D the 55-250 won't fit. I would really appreciate your views before I make the next move.
Regards
Bob
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