Shameless Plug: If you like FM (I do as well, and own a digitone too)… I rebuilt the FM Synth Engine of the digitone in VCV: Mo's sphere of random patches / music - #15 by mosphaere
Still waiting on some refinements from @Squinky 
since I would like to replace the FM-Ops with Kitchen Sinks (because of build-in folding) - but it works well, and you can get a ton of sounds from it, which are actually very close to the digitone.
On.Topic: I agree with @Olival_Clanaro - the better the effects, especially reverb, the better the sounds of a VST. I never use any build-in effects, they are often not up to stand-alone hardware or software units. And a good delay or chorus or reverb (!) has a lot to do with a good overall sound. We have the luxury of plateau, which is a very versatile and usable reverb in VCV. The more modules you find for your style of music, the better the combination of them will be in VCV. In a VST you are limited to the choices of the developers. Nice sounding VCO but not so great filter? Not a problem in VCV.