I know there is a topic on this so tell me if this is a bad question here, but is there a standard zoom that is better than this new Sony? I know Guy as posted previously on the Leica 35-70/2.8 (a heavy and expensive beast). But what about the 35-70/4 Leica or 35-70/3.5 Zeiss? The 28-90 Leica?? Is the (heavy) Canon 24-70-II better?