Depends on the missions and num er of marines, but the Paranid Nemesis corvette's usually a solid choice. It's fast and heavily aremed. The Nemisis is a compact but deadly corvette; the ship packs firepower. If you need a larger cargo hold, you might consider the Minataur Raider. Not nearly as well armed as the Paranid Nemesis but possesses decent speed and firepower and is a sold choice.