Have heard slotted for structural stability, some looks, and to prevent glazing of the pads for performance riiight down to the caliper.
Holes means a crack has to go 1/4" between holes instead of 3" from edge to edge of the rotor. If you intend to use them for anything intense, I would go slotted if you are set on non-blanks.
Otherwise, Brembo blanks seem to be the most common OEM replacement. Either paired with EBC or Hawk pads will amaze you at stopping times and pad life.