WOW, buying a helmet online before trying it on? That's a no no... Head shapes are different, and there are different helmets for each head type.
The Arais were too narrow for me so I got a Shoei. The model I got was the X-eleven, size Xtra large. hehe, The helmet is super light, strong, lots of ventilation, and above all, very comfortable. Of course I tried on the helmet at motorcycle shops before ordering exactly what I wanted online.
My helmet was $440 shipped I believe. yikes
No this was not for autox, but for my new Yamaha R6. I've also used the helmet for go cart racing, and driving my dual sport motorcycle which I just recently sold...