I liked Civ 5 more than civ 4 just because it made war a viable option by getting rid of unit stacking.
Hmm I have heard that. Maybe I'll give it a try one of these days. I'm not much of a warmonger, but the unit stacking in Civ IV gets pretty ridiculousness. You play Civ Revolutions much? How does it stack up? Does it manage to maintain much of the depth of the PC games?