Start with the lenses that you'd use on the 7D (i.e. 70-200, 100 macro or a fast prime), and skip the ones that make more sense being used exclusively on FF (16-35, 24-105). The 24-105 is a better value if you get it as part of a kit, and the range of the 17-55 is much more useful than the more expensive 16-35. When you move FF, then you can sell the 17-55 and get the FF with the 24-105, and later get the 16-35 if you need it. You don't want to get lenses intended for FF use too far in advance b/c your plans might change. They might come out with a new version, which you might prefer or the existing one might have a price drop (i.e. 5DII price reduced after 5DIII announced).