Ferodo DS2500 are great (I use them with Zimermmann drilled disks) and as i read on brakes comparison tests a combibation which performs very well is DS2500 with Brembo disks. DS2500 have coefficient of friction = 0.5 (pure racing pads have approx 0.6) while normal pads have around 0.35). They also have a special layer between the friction material and the metal plate which isolates the heat from passing to the caliper and get the fluid real hot, which is also important. OMP racing also have coefficient 0.48 but they produce more heat, they are cheaper but i havent tried them personally. I m considering of risking and fitting them since my ferodos are at the end of their life (combining them with brembo disks) and see what happens..