Recently, having purchased Civilization IV and the Warlords expansion, I have a renewed interest in turn based strategy/empire building games. I used to play Master of Orion II and Civilization II a lot but when Civilization III and Moo3 came out, I thought both games to be awful and lost interest in the genre. I heard there was a Mac version of Master of Orion II but I don't know much about it. I have a first generation MacBook Pro and I suspect it would not be compatible at all. Are there any recommendations for space empire building games?