Get to a store and wear different brands and models. Not just put it on but wear it for like 10 or 15 minutes and walk around. Every brand fits different and you don't want to drop almost $700 to find out the helmet fits like shit.
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The Arai is a great option to go with, the fit is the most important. Arai has different interior head shapes to give more of a custom fit. There a many options out there and everyone will have there own opinion.
Location: On an intergalactic cruise, in my office
Just remember fit is more important that graphics. Go to a local dealer or apparel store that stocks a big selection of brands and sizes. Try the ones you are considering on, and choose the one that fits you best. Certain helmet brands and models fit certain head shapes more appropriately than others.