Using a large, full width header image is a great way to make your web design stand out. Here is a showcase of several sites who use full width header images in their design. Check them out here.
“Utilising large fullwidth header images in your design is a great tool in a designers repository. Many sites use it to convey their message, or utilise it as a high impact landing page. Serving a rich combination of typography and imagery can help provide the user with a strong initial visual perception of the site.”