I bought a new helmet yesterday. I'm doing a trackday on Labor Day, and didn't want to use either of my existing helmets.
I have a Schuberth C2 that I normally use for riding - it's a flip-front, and I'd rather not use it on the track. And my old Shoei RF1000 never fit me well. Also, Buttonwillow is really hot in the summer. I went to Road Rider and bought the most ventilated helmet they had - Arai RX7 Corsair. I don't like the shield system on Arai's, but this helmet fits me well, and definitely vents - I had plenty of airflow riding in it today. It also seems a little more aerodynamic than my Schuberth on an unfaired bike.