I've always had pretty good luck with HP scanners, although the quality seems to have gone down over the more recent years. Buying one that does B-size might mean a bit better quality, since those would be more directed towards a business environment.
You can choose a rotary scanner, used for high-speed document scanning, using a CCD array instead of a photomultiplier. http://www.ecvv.com/product_directory/Scanner.html. It is is a type of drum scanner.