I recently bought a Nikon D3300 and have only used the lens that came with it. I am thinking about investing in upgrading, but was unsure which was more cost effective in terms of picture quality: upgrading the body or getting a better lens. A family member has a Nikon D7100. He shoots on automatic and really doesn't even know how to use the manual controls. His pictures look, to me, very crisp and have a quality that I'd like my Disney photos to have. Could I get that with a certain lens or only by upgrading the body?