Originally posted by GeneV What does Vuescan add? The manual on their web site doesn't tell me much.
Gene, best way to go is just to try it, as you can use it in evaluation mode for free. Vuescan has a very sleak workflow and supports almost all scanners out of the box. So you can use one piece of software for all the scanners in your system (I always have two scanners for different purposes). I skipped Nikon Scan (though that was an older version, may be newer ones are better) immediately after trying and don't use the Epson software, too (not to mention the horrible HP software...) I also tried Umax/Mikrotek supplied software and in each and any case I found Vuescan to be easier and faster to use with better results from the start. Silverfast was a step up: more complicated if you really want to extract the last detail from an image, and very expensive, as you need a new version for each scanner and only the most expensive versions offer all those niceties, that Vuescan has out of the box (see below).
Vuescan supports colour management with IT-8 targets and does so fairly easy. It also supports multisampling, which is a good (and cheap, aka free) option to increase dynamic range and reduce noise, when scanning high contrast images. All these things you have to pay extra with Silverfast - so Vuescan is a real bargain in comparisson.
I know some photographers who actually prefer it over Silverfast, because it is much easier to use. I personally prefer Silverfast for slides and negs, as it allows just the last bit more control. It is, I think, a matter of personal prefernce, whether Vuescan or Silverfast is a better match for your own workstyle, both are very capapble.
Ben