I wouldn't invest in a rim brake frame. The biggest improvement in the ride of any bike comes from using wider tubeless tires at lower pressures on wider hookless rims. With 25mm internal width hookless rims, 28-32mm tires can be run at low pressures without increased rolling resistance. I run 28mm tires at 52/56 psi based on the zipp pressure calculator. Rim brake calipers usually won't allow a 28mm tire that measures 31mm on a 25mm IW rim. Component manufacturers are all supporting disc brake frames now.
The Paris is the current endurance model. It has typical tall stack and short reach geometry and like most brands, the frame size numbers mean nothing.
https://pinarello.com/usa/en/bikes/r...ometrie_anchor