Insert Heresy Here:
What does that mean? It means (and I do this a lot), if you like the idea of Chaos Space marines, but want to try some new 'bite', use Loyalists, and paint them up.
For instance, I'm a huge Thousand Sons fan, but, well, they suck. Therefore, using a mixture of Grey Knights, a vanilla Librarius Conclave, maybe some other formations.
If you liked assault Chaos, like Raptors/Warp Talons, check out the new Kauyon book, where some Raven guard formations add great things like assault marines and vanguard vets, etc.
You lose out on the 'pure' chaos, like Helldrakes and other Dino bots, but really, that's about it.