SillyHollow: I will definitely get this one!! Playing Alpha Centauri at the moment and it's amazing!
yaster: ATTENTION! Stop! Lower your expectation before it's too late! Don't be badly disappointed!
No, really - Alpha Centauri is up there at the pantheon of the best civ games, right next to civ4+bts. Shaping expectation upon such monstrous thing can't end too well. I remember Call to Power being quite nice and I think it's different enough to warrant at least a try, but still! SMAC! It is a beast. It devour three infants every morning and then bath in virgins blood. How can you compare anything to that?
Amen to that. SMAC has features that are missing in Civilization today, like the unit workshop, the 3d terrain, interesting diplomacy, brutal terraforming, planetbusters and truely different factions.
I'm replaying SMAC since this week, as I found some really good guides and a community patch at Apolyton.