if you car about track, stay coilovers. There's a reason why you don't see many race teams running air bags. Springs are consistent. With bags, there's too much extra itshay to go wrong.
That said, are you serious about track racing? A lot of people talk the talk, but very few walk the walk. I didn't notice any mention of having tracked the car before, other than autocross or going down the drag. You have a few mods that would need to change before you could reliably track the car anyways. It seems like it's built more for street driving and bags would give you that look you want, and the luxury to raise it up without having to dick around under the car all the time.
