I am thinking of purchasing an arai but dont know about there helmet shapes and the nearrest stocking dealer is 3 hours away. How are you supposed to know which shape to get. I am looking at a quantun 2 which is there best selling helmet. Shoei, hjc, scorpion all fit me about right. Has any one had an rf1000 and a quantum 2 that can compare the shapes or give me any info.