Sirocco

The Yuuzhan Vong are an alien race that invaded the galaxy some twenty-five years after the defeat of the Emperor at Endor. The full story is in a rather long, but good, book series. And yes, Yuuzhan Vong ships would be excellent, although I think that their abilities should be left at full so that it does take a number (although not ten like Admiral Sarn said) of ISDs to kill them. Unfortunately, I'm not sure how this would work and make the game still playable, so I won't talk about it anymore. I personally liked Czulkang Lah more than Tsavong.