Assassin__X--Many LBSs and some internet mail order companies will let you try out a saddle for a while then exchange it for another until you find the one that works for you. Terry Precision Cycling is especially good about this, and they even provide a guarantee. They are on the web at www.terrybicycles.com
But definitely check with your local bike shop first, especially if you want to avoid shipping charges and waiting for things to arrive in the mail.
--J