The only things I know are specifics that Rolster gave me when I did the edit for Boy Comics #14... scanned in at 4800 dpi, saved as TIFF... then edited with Photoshop (some experimentation will be necessary here, which only you can do, as the photographic quality of each fiche varies...)...
What titles do you have? You might want to check with Rolster or Yoc or Darkmark to see what is already being worked on, and what still needs to be found...
As to scanner hardware, I do not have a clue as to the best available... again, Rolster, Yoc and Darkmark would probably be the ones to ask...
Hope this helps a little,
Cimm