Keep in mind that rotor 'warp' is not actually warping at all. It's caused by hots spots on the rotor. There is an excellent article on Stop Tech's web site about rotor 'warping' and proper bedding of new pads. If you have a heavy brake foot in stop and go traffic that can really tear things up as you are constantly burning hot spots into the rotors.

for normal driving there should be absoltely zero need to go with slotted or drilled rotors for this car. If you want to do something then I suggest a mild slotting over drilled. Drilling weakens the rotor.