I recently purchased a flatbed scanner (Canon D660U) with the intention of getting a lot of my work on computer and cutting down on printing costs. The scanning resolution is 1200 dpi and with negatives it is ok but not fantastic. But with slides the focus is out and quality is terrible. Would it be better to make an investment and get a dedicated film scanner (looking at the Canon FS2710, the FS4000 is out of my price range)? Any advice on the matter or experience with these scanners would be welcome.