I sculpted and rendered this with Zbrush Core (my first project). Not perfect (the metal band is not flat, and i didn't managed to give color to the eyebrows without them looking super weird).
Sculpting is one of my favorites things in CG and i want to improve :)
If you want to learn ZBrush Core i would recommend the awesome tutorial series by Michael Pavlovitch, completely free on YouTube.
I agree with the recommendation of Michael for good tuts!!
:D