Well here's what I know and can suggest, I'm using and old Canon FS2710 ( I bought it for $50.00 ) Slide scanner, it has an SCSI hook-up, works pretty good, ( but you really need to know about computers to get the SCSI configured ), but you'll have to use PhotoShop to deal with the image once it's scanned, I've also have a Nikon CoolScan V scanner, this is the scanner to buy ( yu can find them from $550.00 to $650.00 on the web ), if you have several hundred slides or more, it's easy to hook-up ( uses a USB connection ) and the software that comes with it is very good, it has a feature ( they call it ICE ) that will mask scratches & defects in a negative, and it's kinda easy to use, and the results are acceptable, at least to me. The only warning I'll give you is that doing this is a HUGE TIME DRAIN!!!!, the learning curve is kinda long , but not too steep, when you get kinda good at it, you'll look at the slide you first did, and you'll do over!!!! As to the Image software, get PhotoShop, nothing else compares, I also would suggest a copy of LViewPro, I use this to really compress the JPeg images, so that they will load fast, for the folks who have dial-up service, for the folks who will complain about the image artafacts from the Jpeg compression, they always have the option of buying a really good scan from you, but don't expect to have this skill to replace your day job!!!!
Best Wishes