Slotted and drilled rotors are mainly for looks. I used to have a pile of rotors that had cracks around the holes and these rotors were high dollar rotors some from Baer Racing. Plain rotors will work fine. Invest your money in good pads. Before I upgraded my brakes, I ran with stock sized cryo treated rotors and PFCM pads just fine. Now I have Baer Racing PBR calipers with custom 2-piece curved vane Wilwood rotors.
Bob
Bob