What loadout? I'd be tempted to scratch build one, Possessed winged backpacks are always useful.
Want to give them a power sword/axe but of suitable bad assery size, as this may also be used as a daemon weapon, then with a bolt pistol, so nothing special loud outs wise but just want a nicer model.
Scratch building one is a nice idea, and considering the amount the single model will probably cost me, plus the extras I could probably get a few more models and only spend a little more, but obviously get more for my money.
If I pick up another box of raptors then I may sacrifice one of them to use as a chaos lord conversion, as some of the poses are pretty cool would just need to find a suitably daemonic weapon for him to use.
I like the idea of using the possessed winged backpack, may have to have a poke around ebay or see if I can pick something similar up from somewhere.