I have just ordered the d20 + canon 24-70L2.8. My main subjects are:landscape, street scenery, children. I will surely need a tele beyond the 70 (which is actuallyt a 110mm with 20d). probably up to 200mm. normally my choise would be a 70-200L2.8. But I am afraid (or hope) that very soon, Canon will manufacture a special series of lenses, designated for the dig. cameras. Prabably much lighter. What are the chance for that?