[indymachinist]

Depends what kind if pads you are running. With modern pads these days slotted and drilled rotors are mostly just for show.

As a side note... drilled rotors that get beat on hard in high performance aplications often crack out from the drilled holes. Slotted rotors are less likely to do this as the slots do not go all the way through.

Edit: I always prefer a high quality blank rotor with no slots or holes.