Arai seemed to fit me the best and was by far the most comfortable. As sil-300 stated, check out modern motorcycle. They have a huge selections and will match or even beat (in all my cases) any price, even online U.S. MSRP!
To give you an idea I paid $439 at Modern for this exact helmet:
http://www.gphelmets.com/arai-profil...ki-serpent.htm