depends on the cash you want to spend
arai, shoei , suomy = top end high quality helmets
scorpion, KBC, icon = medium
vega, zox = low end
choose what fits you and feels the best on your head, you gotta wear it alot.
i have an icon, and i love the interior of the helmet. i think it has a nicer feel than the shoei of the same price i looked at.