I think all Khorne is the weakest of the new god lists.
I'd rock a mix if I was you. If you want to avoid people crying out against the fluff have a powerful looking undivided lord or something.
Dark Angels 1750 win/loss Record
Win - 23 (Belial helped wreck Ryan's puny Eldar)
Loss - 13 (Brice's Necrons wiped me)
Draw - 2 (The 13th hold out in alpha take and hold)