Replaced my stock Prologo saddle on my CAAD10 with the 155 Specialized Avatar Comp Gel last week. The LBS service really sold me on it after taking my measurement and showing me a few options(Toupe, Romin) but recommended the Avatar when I mentioned I was mainly hurting on just longer rides . 80 mile ride today and it felt much better than the stock saddle but I guess nearly anything would have been an improvement.