I have the fizik Aliante with the grove like in the link below. I like it. No complaints. They have different models based on your flexibility. May be marketing BS but after riding all three I liked this one best. Find a shop with demo saddles (regardless of brand) because you need to put some miles on it before you will really know how it feels.

http://www.competitivecyclist.com/pr...-10589..0.html