Your image files may be backed up, are your applications? What about your system software? How long will it take you to locate all of your install disks, serial numbers, and activation codes to re-install your software?
If you cannot afford that kind of down-time, consider drive-imaging to create a virtual image of your entire hard drive. With a drive image back-up, you'll save not only your data but your programs, drivers, and all the settings that make your machine yours.
Read Edward Mendelson's article on pcmag.com and see how he rates 5 popular drive-imaging software packages.