Drilled rotors decrease the structural integrity of the rotor. Over time, heat cycles will crack drilled rotors.

Slotted rotors are some of the best rotors you can get. The reason they are slotted is to evacuate the heated gases during braking down the slots. In theory, this is supposed to keep your brakes cooler and more efficient during braking. This in turn will decrease brake fade during hard braking.

If you aren't out at Sebring or another road course on a regular basis, slotted and drilled rotors are a waste of money. The standard OEM style rotor will be more than effective for street and some track use. Get yourself a nice pair of pads, maybe some stainless steel brake lines, and a good bench bleed, this should suit you well.

However, seeing as you have a Nissan Armada, which is an SUV, you don't need any of the above. That thing will never see any type of performance related activity, so just go OEM and save yourself the money.