I have the Bell Sweep XC, which comes with visor -- some of the Amazon pictures show it with the visor on. It is nice enough.

In 2003, my front wheel got stuck in a crack on the road and I hit the ground hard, cracked the helmet and actually saw blue when sat up. No concussion diagnosed in the ER, but the first question out of the doctors and nurses was, invariably, "were you wearing a helmet?". If nothing else, wear a helmet so you don't ever face possibly judgmental medical staff.