Well, if you want to spend money (!) the Nikon slide scanners are very nice, Microtec has (or at least had) one of the more inexpensive slide scanners. Also, the very newest flatbet scanners are starting to do 1200 (real, not resampled) dpi, a slide attachment on those would get you 1800 x 1200 pixels, in the ballpark for all but heavy-duty DTP work. Microtec was bundling the slide attachment with the scanner, I don't know if they do it anymore.