My own choice to go with the EBC was the reduced dust from the EBC pads and the difference in performance from the slots. One safety issue with brakes in general occurs when the rotors get drenched by water. While I've gotten into the habit of pumping my brakes a little at-speed after running through a huge puddle, I like the added advantage the slots bring to scraping the water off the pad/rotor interface. Slotted rotors will also wear the pads more evenly that flat rotors which tend to develop quite a groved surface over time!
I also have Kleen Wheel dust guards (with turbo venting!) that changes the airflow through and around the rotors. While the venting adds something that other dust shields may not, there is some added benefit to the slotted design for cooling, moreso with the gold GD923s. Since the car is so light, the heat buildup shouldn't be great but there's no sense in making things significantly worse (or better) overall than the factory setup.
Not everyone needs a change in brakes. There's nothing wrong with the factory setup under normal use. I'd suggest also that there's nothing wrong with the other brakes and rotors under normal use.