Deep Space 9.
I'm not him but a tablet is something you should just have. ;a
Keeps the CT (Carpal Tunnel) away and your arts that much more natural. If you are a trained artist, then for sure, it's a the purchase you make right after the monitor. Or so I suggest to students.
Look at 3d-Coat, too. It is not a replacement for ZB; it's a standalone-plugin for LW. A nice entry program for such tools, as well.
ZB is king. 3DC is the little engine that can.