im in agreement with acf i dont think they make that much difference i like to go with ordinary mintex discs and pads the grooved discs are just a style thing that make car look a bit snazzy plus once the discs are about a 3rd used the grooves all disapear anyway so your just paying over the top for some snazzy discs that your only gonna get a 3rd ov the use out ov unless you carry on running em with no grooves which puts you back to where you was with non grooved discs if you get what i mean.well thats my opinion anyways.