IF you're doing landscapes, spend the money on solid tripod and a cable/ir cable release....
IF you're looking for glass to reach out, save up an extra $100 and get a used 70-200f4L - about $500 and should include a lens hood. It'll be a lens that you'll use for years, give you solid results every time. Yes, there is no IS - but if you're dealing with daylight, it'll love you very much. Best part is that you'll be able to sell it later on for the same amount.