So I bought a copy of Shogun 2 (Limites Edition) and installed it, and was very pleased with it. In it's current state, it's really balanced, and more optimized then any other TW game CA has ever released.

I haven't had alot of time to play the campaign extensively yet, though I did get to play (and win) my first MP battle. The fact that all units have been standardized makes things very easy to learn, yet there's still alot of depth in each unit because of their special abilities. Not to mention the customizable character/banners for your units.