Second on the City-builder series. You'll find Zeus and Pharoah to be extremely similar to Caesar 3, but all three are great games (if a bit old at this point; that said, they still run fine and their graphics haven't aged too badly). Emperor: Rise of the Middle Kingdom was the last of the officially-sanctioned Caesar-3 knockoffs, and was actually made by a different group. Each of them has minor variations, and you can get significant debates about which is "best" (personally, I prefer Emperor - the Feng Shui mechanic makes it less a matter of simply fitting in pre-designed housing blocks and forces more creative adaptation to the map in question).
Children of the Nile is the last in Sierra's City Building series so far and is quite different from it's predecessors; I actually picked it up on sale from GoG a week ago or so and haven't played much of it yet. Looks promising.
I really can't recommend CivCity: Rome. It's not a terrible game, but it's quite shallow and pretty easy. It took all of about an hour for me to master it, and just a couple more before I was thoroughly bored with it... although I grimly pushed through the rest of the Peaceful missions in the hopes things would get more interesting. They didn't. Where games like Caesar 3 required careful advanced planning in your city layout (at least for the later levels), in CivCity: Rome even it's pretty much sufficient to just build stuff as the game demands it, and keep spiraling your city outwards as new demands crop up. I suspect it was aimed at people who'd never played city-builders before, and/or were eight years old.
Imperium Romanum... I'm told is simpler and easier than CivCity: Rome. On being told that, I immediately dropped any consideration of getting the game.
Grand Ages: Rome is on my to-get list (along with a thousand other games). If you do get it, let me know how it is; it looks quite good.
(i guess they are after the hegemoney though anyway)
