The Microdol X I'm using right now is beautiful. I love it. I've not yet gotten to the DK-50...but I will sooner, than later. Acufine is supposed to be a very good developer for fine grain and to give a pop to the negatives. If that pop is high contrast, I'm all for it. Otherwise, I'll accept the fine grain attributes. Are there any other developers for fine grain?
If it helps, I use Legacy film, T-Maxx (worked great with the Microdol), Arista Premium, Fomapan 100, Kentmere (100/400) and most of the Ilford films, the slower the ISO the better.