I know many swears by Brooks 17, but my buns isn't made for it. I sold all my Brooks 17.

I find the Selle SMP to be the most comfortable, followed by Terry Liberator.

Surprisingly, this one made it on my list too.
http://www.amazon.com/Velo-Bio-Logic...Bicycle+saddle
I find it similar to Selle SMP in comfort, for not so much money.