Here's a sampler of two of the ships:
Obviously, these aren't the most accurate renditions in the world, but these ships ARE quite a bit larger than the 32x32 SLR ships. Plus, I'm limited to one base color per ship.
I've got two for you: The Serenity and the tardis.
I would have said x-wing, but I think the Neon sprite in game is pretty close. Also, if you turn the banshee sprite around, it could be a banshee from Halo!
Whoa, almost forgot this existed.
Anyways, here's my (failed) attempt at the Sentry:
I'll get around to the other ships eventually, I've just been rather preoccupied lately.