Tried the DS2500 with EBC slotted and also OEM smooth - didn't notice a massive amount of braking difference so have stuck to OEM discs and DS2500 pads.
I have looked at those pads they have a good rap on them. So, if it is not broken do'nt try and fix it....
The problem some of the time is two many choices and you do not want to make a wrong one as it cost to much bloody money.....
ever thought of cryogenics on the rotors and or clutch/flywheel??