It looks like I had also picked up a Mantis Assassin/Hunter Bug for StarShip Troopers in October that didn't make an update.
So that brings my total to a reasonable number of bought vs painted for the year.
40K – Dark Vengeance boxed set - 48
Walking Dead horde – 14
SST Mantis Assassin - 1
Running total 2013 – figures bought 63, figures painted 0
I remain ever hopeful of putting a figure in the painted column - perhaps this year will be the one to do so.