With all the hocus-pocus in PS, I have not been able to present a scanned image on a monitor that looks better than the print it is scanned from. So I am not worried about representing an image as "better" than the original. Just ain't gonna happen with my level of equipment. And that's okay. When the day comes that people travel from near and far to see an 'original', they will be pleased.
So I feel make 'em look as good as you can. They won't be better.