i dont....
For the RT, you really really wont need anything better than OE, but you can get the ferodos from halfords, which are actually very good, but give off absolutly huge amounts of dust. Or mintec 1144 is your wanting to go towards the performance side.
If you really want o go for it, you can upgrade to a clio 16V brake setup.
Me and some other people have i think.
all you need are teh calipers froma 16V which bolt stright on, but the pedal goes a bit squidgy, so i changed the master cylinder too......much better, vented ratehr than teh solid discs.