The only two I've even considered have been Vuescan and Silverfast as they do IT8 calibration. Licensing for Silverfast seems punitive- you seem to need an additional license for each different scanner model attached to your PC which just seems insane.

So I've been using Vuescan (Pro) and it's been completely satisfactory. It does a *lot* more than what I ask of a scanner so I only use IT8 calibration and dust reduction. Anything else is left to the occasional and rare foray into photo editing software rather than scanner software.