+1 on Arai but their shape does't fit me very well. Anyway snell approved always make me feel safer.Can't believe some german ww2 looking helmets is also DOT.Btw good ventilation really makes difference. SHOEI RF-1100 is on sale lots of places since RF-1200 is came out.
helmet - what's your head worth.
If you don't want to pay 800 for a schuberth, forget bell, shark, or any other brands. get a Snell approved entry level full face SHOEI or ARAI around 400 bucks then you are ready to go.