And funny I just mentioned this in another post:

That's like people who ask "What's the cheapest helmet I can buy for track days?" I always hear "How much is your head worth?"

I don't know how much water the air bag and closed face helmet issue is. At the speeds you are going and on a closed course I wouldn't be that concerned about this issue.

Open faces are supposed to be more comfortable but I never liked them. Plus I wear contacts so I wanted one with a visor.