I have a terry saddle, and I've had great success with it. If you get it from REI, they have a 100% satisfaction guarantee, so if you don't like it after a while, you can still return it (I've heard stories of people returning dog-eaten shoes or ten year old jackets and getting brand new stuff because of the warranty!!)

Also, I've found that tipping the saddle nose slightly down makes a world of difference for a time trial position.