Looking for a little input to decide between factions, help a chap out?

The Ashtar are pretty much psychic (aka magic) space elves. Dogmatic, keen on prophecy, destiny, gods, and higher purposes. They're good at answering questions, but not so great at asking them. Fond of sleek organic shapes, beam weaponry, and shiny spaceships. Some of you may recognize them.

The Imperial Systems Commonwealth is...let's call it a monarcho-parliamentary imperium. They enjoy oppressing new member species, annexing their neighbors, and colonizing every scrap of real estate they can lay their hands on. Pragmatic above all else, they believe in higher purposes when it suits them. They prefer more utilitarian designs, massive broadsides, and elaborate fleet tactics.

Any preferences?