+1 for VueScan; after trying the manufacturer's bundled software and Silverfast, Vuescan was clearly the best in terms usability and function (I scan negatives, digitise notes/newspaper articles/&c., and photos for restoration and with Vuescan its quick to change your setup- and there's as much depth of function as you'd be likely to ever want)- also its impressive in terms of updates, you shouldn't get caught out on new scanners and operating systems. So yeah, bit of a glowing report but it really is worth a look.
cheers!