If I understand correctly, an Omni 5000 is a .5 needle and nozzle.
I think most people here would only use such a big nozzle for backgrounds and metallics.
I think when badger says it's great for everything from broad paint to fine detail they had something else in mind ( maybe models, maybe Shirts) not really sure.
For the most part I think illustration detail work is typically done with .2 or .21 and .18 size range of nozzles.
.3 here and there.
I could be wrong but I don't know of anyone doing illustration detail work with a .5
Not that it impossible, but I imagine it's fairly difficult to do high detail with one.