Graphic Design Tip: Using Stock Images
Shutterstock is a great choice for stock photography and vectored files. They don't have quite the selection as iStock Photo, but the prices are generally lower. A great site for designers on a budget!
iStock Photo is another good source for stock photos and vectored files. They have quality images and reasonable pricing. When selecting images for a large graphic (such as one to fill a full 10' wide display) look for images that are either marked as a vectored illustration or a minimum size of "XL."