I have acquired a airbag that I was thinking of installing. What purpose would it serve on a street car and would it be worth it- no, I do not plan on going to the track. It's fast, and no, I do not care about a time slip
I'd personally go for 2. They helped my ride in the riding and handling part. I know there are other things you can do to improve upon these, but I'm not aware of a cheaper option. You have it already so why not.