In reply to Richard Carter: i have a giro zenith. Bought it because of many best in test review. Plus if I'm honest it think it is of the of the coolest looking helmets.
A car ran over it in the parking area (little scroat still hasn't paid).
Anyway I had no choice but to wear it for that ride,and yes I did have an over the handlebar related incident. The helmet performed sterling although I chipped and badly cut an elbow.
This incident has given me total confidence. In the ability of giro equipment.
I also took advantage of their new for old policy same as poster above.
Since getting a roadbiking there was one one choice.The Giro lightweight number in the LIVESTRONG colours.
Good luck and you won't go wrong with giro