Here is a picture from the new Fantasy Skull Crushers kit. If you are building a Khorne army or just one unit this is a great kit for the conversions.
I think Khorne made very out well with the new Chaos Space Marine codex. They are very strong in melee which is obviously appropriate plus a lot of their units have great lots of choices for options and wargear. What I like most about Khorne is the opportunity to ravage gun line armies which are all the rage now. Just one Khorne unit can wreck a lot of havoc. It is a great time to play Khorne.