definently dont go the drilled rotors, they are only for looks.
even the ceramic discs on a porsche crack.... but one strange thing is that the front disc on my motorbike has no cracks in it... its drilled, and its now worn thin enough i need to replace it????
slotted rotors are fine for the street and track.
my dad has dba slotted on his landcruiser front and rear, and my mum has slotted rotors on her forester (NA)