Medium Arai RX-7 was my first helmet. Then went to a Shoei RF-1000 and X-11.
Picked up a 2008 Bell (large, when the sizing was off, this would be a medium in the 2010 models).
Personal preference of course, but I cannot stand the Bell. It feels like it exposes my chin. The pads touch a lot less of my face. More air flow, but what I consider too much from underneath. Very noisy for me. The anti-fog shield does nothing but fog within 100 feet of my garage in SoCal.
Mfg quality seems high, comes with a nice bag...just not for me.