GMG - I know I'm a heretic, but outside of looking pretty in pictures, I think the Ribmos role about the same and are FAR less troublesome and more durable. Sure - Paselas are pretty...but that only goes so far. At the end of the day, they don't roll well enough to justify the awful puncture resistance and durability (in my experience).
I'll throw another one out there - the Challenge Roubaixs are the most disappointed I've ever been with a tire...and it leads me to believe that many here value a tan sidewall more than functionality.