So now I'm wondering what to do with this fellow. I just liked the model when I acquired him and had not started Chaos Space Marines at the time. Now I'm thinking either Daemon Prince of Nurgle (sans power armor, maybe add psychic levels) or as just a spawn. Spawn-hood seems an ignoble end for a former greater daemon model. I already have a Daemon Prince of Nurgle in the form of an Ultraforge resin model, so this guy would only really be useful if I wanted to run two DP's as my HQ.
Here's the comparative sizes. Now that I'm looking at it the basing may be accentuating the differences somewhat. Then again, the Ultraforge Greater Plague Daemon dwarfs the Ultraforge model I'm using as my DP.
I keep adding photos to this post... Okay, here is the Ultraforge greater daemon for comparison.
The Ultraforge model is easily 5x the volume of the metal one. Even if I end up starting a Chaos Daemons army to ally with my Chaos Marines, I would use the Ultraforge model for my greater daemon over the recast. I just don't know where he fits best.