I just picked up the 155mm Specialized Toupe Pro. So far it's working for me. I went in to buy the Romin, and the shop guy told me that because my sit bones are a little wider than 155mm, the Toupe would be a better fit because the sides of the contact area don't drop off as fast. The only thing I don't like about the Toupe is the sharp plastic nose piece. I like to lean back into the front of the seat when I'm standing at stop lights, and the Toupe is like getting poked with a stick.