I never tried Dopus5.xx. I didn't want to pay for it and I didn't want to 'replace' Workbench.
Dopus 4.1x is the most sophisticated dirutil that I've used, it is still my main workhorse. I have used other utils listed below. I like sampling other peoples config files to learn new tricks. Grin
Warning: repeated message follows.
Clickdos II: small and light, configured with a text file, nowhere near as sophisticated as Dopus.
Ordering: optimized in assembler, easy-graphical configuration, much faster than Dopus especially when running at 7 Mhz, very nearly as flexible as Dopus (customizable menus, buttons, datatypes, etc), better looking than Dopus, small resource footprint. I still use this one too. Has a minor bug on disk sizes, I ignore it.