Man of Honour
I've been playing CK2 for the last few weeks and just can't find the depth in it. I spend most of my time waiting to fabricate claims.
I've been looking at getting this instead for my strategy fix.
I can thoroughly recommend EU IV in that case. It offers a perfect blend of war game, political diplomacy and world conquest. The only thing i would say is that you need at least a few of the DLC, and these are pricey together. I've got them all now. But it took a while to get there.