Hi! SB> Scanners used will be an Imacon Flextight 626 (I believe SB> that's the number) and the Nikon Coolscan IV 4000dpi unit, SB> if that makes any difference.
Let me add my bits to that. One of my friends used to have the Nikon scanner you mentioned. Apparently, scanning usual B&W negatives was not this scanner's favorite. I've been given some technobabble about LED based Nikon and diffused light based Epson flatbeds... Anyway, to the taste of that guy, outcome of Nikon sucked. He then went to buy himself another scanner as he is a pro and has to do a lot of scanning. I wouldn't be able to help you with your choice between RGB and grayscale. But perhaps it would be worth if you forwent (?!) Nikon and went straight to Imacon scanner. Just my cents. Boris