Tubular upper control arms ?

What kind of racing? If you're doing road/autocross, you should look at the Magnumforce Double adjustable arms. These allow adjustment of the A arms without removing them from the car, which would allow you to change camber settings according to various tracks, weather conditions etc... without ever taking the arms off the car.

As far as weight savings vs the originals, I doubt its much if any. But the aftermarket ones will not only give more adjustment, but get rid of the flex that the stockers have.