I'm not getting any of them. I was never a huge fan of the metal daemonette models (even though they showed naked boobs), as their arms were way too fragile. I always had their arms breaking off all the time and they took forever to re-attach. I much prefer everything to be made from plastic. The characters are cool, but none I need for my KDK.
Why get the thousand sons upgrade kit, when fantastic plastic models are around the corner? I find it odd they brought back that of all things.