For some time, I've been looking at Future Armada's Invictus with a curious eye, but I haven't had actual need for it. A few days ago I run a session of Babylon 5 and went to check what DriveThruRpg has to offer. I had been looking at High Space's Euphoria as I was planning to use it's setting Lantern as a base for the game.
Remember the opening scene of Babylon 5 (not the pilot, the actual series), where Narn fleet attacks a Centauri space station in Ragesh III I was sold the moment I saw that, as it made an immediate connection to my favourite PC game intro - Master of Orion 2.
"If there's a center to the universe, then you're on the planet that it's farthest from!"
-Luke skywalker, speaking of his homeworld Tatooine
Addition: I added a few WIP pictures of the buildings to the bottom of the post.