Hi all, I interested in getting a new helmet and these are the two brands I'm currently looking at. Vemar VSREV and OGK FF4. My questions are. Which one is do you think is better and why ? Also I not able to try on either one. OGK is not in the states as far as I can tell and no Vemar dealer close enough. I am Medium in HJC AC-12 , Arai Corser V and Shoei X-11 and RF-1100. So would a medium fit me in either on of these.