Would like to know what the next step is....... I have had my new camera for about 4 weeks and having a great time. Nikon D60 with a kit lens (18-55mm) and just purchased a SB600 since I thought that is the next must have. Not sure what the next logical step is. I assume it is a lense. Wider angle, zoom? I hear a lot of people talking about a fixed 50mm 1.8 sigma. Thanks in advance for the feedback.