I also prefer ProScan. At the $50 cost, it has all of the logging and recording features that ARC pushes to it's $69 "Pro" version. The $39 "Basic" version of ARC is programming only.
Plus, ProScan also works with many other older scanners, not just one model series. But, try it on the 30 day trial period. If you decide you like the ARC product better, go with it.