I am thinking about getting the 5D2 and the 300 f/2.8L IS lens. I will be using this lens to take landsacpe and/or wildlife photos. I also might get the 1.4 converter. I know this is a great lens but is it good for landscape photos or should I get other lenses? I already have the 24-70 f/2.8L, 70-200 f/2.8L and the 100-400 f/2.8L.