Thanks for all the suggestions! I'm "settling" right now with the WTB comfort V. The Carma does sound good, though, and the Selle SMP Strike sure looks interesting. My Comfort V is great for the sit bones, but still a bit wide in the groin, and a bit too much pressure under the symph pubis when I'm on the Bianchi. It's perfect on the Larkspur. Argh. The search continues!