The Future Armada series is awesome! Each set includes a detailed write-up of one or two ships, including diagrams, deck plans, and d20 stats. The deck plans are provided in a small-scale image so that you can see the whole layout of the ship on a single page, as well as miniature-scale tactical maps in both black-and-white and color versions. In addition, each set includes a handful of very attractive CG images, showing in action (in space, flying through the atmosphere, in a hangar, etc.).
Even if you're not a d20 player, the images and deck plans make these sets well worth the cost.
(Some of the ships reminded me a lot of a Firefly, so these ships would work really well in a campaign set in the Firefly / Serenity universe.)