I am somewhere into the 2600s right now in a game where I had quickly obtained Fen Habbanis early on. The Ecumenopolis is not even half populated yet (still pushing people in from all over my empire) and it is the SOLE source of consumer goods and alloys for the entire empire. My empire is not very large (only about a dozen planets) but still, for a single planet to be able to single handedly supply this empire is bloody amazing. I shudder to think what it would be like if the planet were to actually become fully populated some day. Forget Cybrex as the great quest. First League is where its at now. If you get the First League chain, don't bother picking up the arcology perk. You will spend most of your game just trying to fill this monster up. No need for more. Good lord, this thing is a powerhouse!