Cycling helmet

Looking to change my old Giro Atmos for a new lid.

Any suggestions please?

My two current helmets were both £14 at Lidle, They have all the appropriate safety stamps ..... don't know if they are the same as are supplied to the Quickstep / Lidle teamhttp://forum.fellrunner.org.uk/images/icons/icon10.png?

I'm told by a girl who used to work in a top end bike shop that she made enquiries; with the really expensive helmets you are paying for what you don't get - the fancy vents.

A buff.