First of all, catch up with the plastic Horus Heresy and some MkIV Ultramarines.
The detailed bases came out at just the right time and I've married these up with Forgeworld shoulder pads.
After that, it may be time for some Praetorian elite Rough Riders.
I'm considering some Curious Constructs models for these but don't know whether to go for the lancers or hussar jackets. It will be some plumed Dragoon heads to go with them though.
Then again, the Deathwatch, along with the unpainted Overkill box at home may take priority.