I'll most-likely be upgrading my '13 Grand Cherokee's standard-duty* brakes to the heavy-duty** 13.8" front rotors and caliper brackets, just because I want to and because I believe strongly that there's no such thing as having too-good brakes on one's vehicle.
The source for affordable rotors, BrakePerformance.com...
Premium Dimpled and Slotted Brake Rotors
...has many choices of slotting, drilling, and/or dimpling the rotors.
I've read that slotted rotors tend to fill with mud/dirt/sand when 4-wheeling compared with nonslotted rotors, thereby reducing brake performance and pad and rotor life.
What do you as an experienced off-roadist think about that?
* 13" front rotors and nonvented rear rotors
** 13.8" front rotors and vented rear rotors