What's wrong with ti seat rails? WTB made their name with mtb saddles with ti rails. They most know something. Mine and hubby's (and a million other people's) have survived plenty of crashes.
WTB has a bazillian saddles. Stop by your shop and take a look. The Rocket is fairly narrow. I like the Laser V. Stay away from the Speed She versions.
Most of them come with chromoly rails as a less expensive option. I like the spring of ti rails.