A couple of months ago I bought a Nikon D40. I have been asked to shoot some landmarks around town for a local business. They want to frame them and hang them up along the walls in their building. The first question they want to know is what size prints I can get from this that are of great quality. So: knowing that I have a D40 and stock lens (for now), what is the max size of a print that I should not exceed. I understand that it could depend on the photo and my cropping/editing...but I want a basis for when I begin doing this. Thanks!