Russ,
I would first ask what type of driving you plan to do. Will the car just see street use, occassional or frequent track time? Then ask Matt Weiss at StopTech for some advice (310) 325-4799. He can fill you in on the upgrades available.
A lot of the technical aspects previously discussed...
StopTech discussion post
Big Brake Kit discussion post
I would say the main reason to go with the StopTech Aero-Rotor is because their angled rotor vanes (like turbine blades) will help cool the brakes better than the stockers. Cooler brakes = less chance of fade and longer life on the brake components. But hey, I'm no brake
guru. Call Matt.
Difference of rotor weights I've taken:
Stock = 22.3 lbs.
StopTech Aero-Rotor = 18.1 lbs.