I am in need of some guidance on lens selection. Right now my kit consists of a Sony a700 and an 18-200 f3.5-5.6 lens. I am contemplating saving up and getting the Carl Zeiss 24-70 f2.8, however I am wondering if it would be better to look into getting some more consumer grade glass such as a 11-18mm, 16-80 Carl Zeiss and a 70-300 instead. Right now I do mostly landscape, family photo's, architecture, and travel photography but I am hoping to be able to start doing some paid events. With this in mind would it be best to start gathering some professional lenses or would a wider range of zooms work better for me. Thanks for the help.