Lacking front safety releases, but insisting on an unsafe structural strength, the Planet Bike fenders just wait to cripple or kill you. It is up to you, either to anticipate dangers or learn by a hospital experience.
This is one reason why I like my SKS fenders. The SKS Longboard has the length that I want, but they only make in 700c.
The Cascadias are not long enough - they are no longer than the SKS's, and you are stuck with the existing mudflap, where my mudflap goes all the way to the ground.
I think that the Berthouds will be my best bet, my only worry is the caveat on Peter White's site - take 10mm off of the width because the edges are rolled under. The 60's turn into 50's, and I have tires that are close to that width. My fall/spring tires (Conti Top Contacts) are 49's and my winter tires (Marathon Winters) are 47's.