I'm a big fan of the B.17, but the other saddles I've had and liked a lot are:

Selle Italia Turbomatic (Turbo shape with little rubber bumpers where the frame met the shell.)
Selle San Marco Concor (Great on mountain bikes, because of the "duck tail" shape, which was great for long, slow, grinding climbs.)
Selle San Marco Rolls (Close to, maybe even tied with, the B.17 for a drop-bar road bike saddle.)

All that said, every body is different, and there's no cheap way to find what yours likes best. There are some that seem to work for a lot of people, but for every saddle that "everyone loves", there's gonna be a minority report of "total ass hatchet... I called for a ride home, and had taken it off the bike becore they got there." Also, your position on the bike will matter as well, as will how hard you tend to ride.

--Shannon