I voted for the machine/organic hybrid, but I like the head of the Preternian Warlord better.
I'd say take the machine/organic body and put the warlord head on it and you have a winner.
I've always liked the mechanical/technological aspect of the Horde. Skeletor and the Snakemen use magic, so it makes the Horde unique.
With that said, I still like the Horde having some magic (Shadow Weaver, Hordak, Horde Prime) but with a technological twist.