Depending on how aggressively you position yourself on the saddle, you'll probably want to look for one that has a nose with more padding than usual. Trial and error is really the best way to find a good saddle though. I recommend starting with an inexpensive one. Performance Bike has one or two house brands (Forte) which may work.

Another one to consider would be the Blackwell Research Adamo ISM seat:

http://blackwellresearch.com/ism_seats.htm

I'm thinking of trying it out sometime later this year just for s***s and giggles.