Thanks for your comments guys!
Almost all modeling done in blender. I would like to have good topology while texturing and don't want to retopologize everything, so polygonal modeling seems the best for me (and for my laptop that isn't that strong). I'll use 3d-coat later for texturing. And I think I'll sculpt a driver.
Here is some reference for inspiration (about broadie-knob - now i know how this thing is called):