I don't have any experience with artwork scanners but some of my relatives and friends have used Canon and Epson flatbed scanners. They are big brands in the scanning and printing business. Before buying a scanner, you will also have to know what kind of artwork you will be dealing with. Each type of artwork requires a specific feature from the scanner. Check
Beonhome to get more info. So, consider the only scanner that fits your needs and not the most expensive one.