I'm starting to mull this again. I'm really liking Spectral Empire less and less with time, as I feel like it's not descriptive of the game and doesn't make me think sci-fi. Something about the name just also feels... weak. I don't know.
As the prototype has been evolving, and so have my designs, it just also seems less and less appropriate to the themes in play. It's true that you are managing an empire, and you do a lot of the things you do in Civilization... but this is also just as much about managing essentially a single colony. I really prefer that word to empire, in terms of describing what you have. You're establishing a colony on the planet, not an empire. This game is basically Civilization meets SimCity meets AI War, plus its own unique flair.
I'm thinking that the word Colony really should be in the title, and not Empire or Imperial or any of that stuff. And certainly Age and whatnot is all overdone, and isn't appropriate here either. You're intimately getting to know your colony, much as you would a city in SimCity. A lot of the other 4Xes are more abstract and distant, although not all of them.