I would suggest the following from Canon:
EF 10-22mm for ultrawide angle
EF 70-200mm f2.8 IS (heavier,faster, IS, most expensive) / EF 70-200mm f2.8 (heavier,faster, no IS) / EF 70-200mm f4 IS (lighter, slower, IS) / EF 70-200mm f4 (lighter,slower, no IS, cheapest)
IS is important for telephoto lenses when you handheld your shots