Dollars or Euros are critical to most of us, if you are waiting till december for the 7D, I would just keep saving and get the camera and whatever wide zoom you choose to grab and then rent the 70-200 and the 70-300. Compare images, compare costs and grab whatever you can afford that takes the shots you are happiest with. If you rent the 70-200, rent 70-300 at the same time and take plenty of pictures that way you can compare apples with apples.


A 7D and a 17-55 or a 7d and a 15-85 is a big investment for most of us, so grab whatever combo the wallet allows and then rent both of your longer zooms and decide which one you are happiest with. You will be happy with both. In the long run it gets down to your budget and what you are prepared to spend.