Well...I've never heard anything good about the handling on bags...
They wouldn't help enough.
Air bags are a total show-compromise piece. They are strictly so you can raise your car to drive it to the show, then lower it for that stupid-ass (In my not so humble opinion) "slammed" look.
Air bags are all show. If you want a performance-driveable compromise, get a good set of coilovers drive to the show, drop the car. After the show, lift the car back up. If you lift it back to the EXACT same height it was, you won't have to align it each time.