The Hedonites of Slaanesh are a great looking army as well as having some very interesting ways to play them. I have a feeling those Godseekers though may be a the most solid of choices getting additional movement with their numerous chariots. Sounds like fun.
The Hedonites of Slaanesh are up for preorder in just a few short days.
Three Ways to Field the Hedonites of Slaanesh