I have an HJC CLX3 - a great helmet, will definitely buy another one - make sure you get one which has a removable interior - makes it easy to toss in the wash. Some of those really cheap helmets mentioned here do not have this option - yuck !
As to wearing a bicycle helemt, why bother. Have the bike just fall on you standing still, and it could crush your skull. I have a friend in a coma - brain dead, all because he did not wear a helemt :think:
As they say in the classics, if you have a 50 cent brain, a 50 cent helmet will do !
If you have no brain at all, then wearing a helmet is a moot point - better to let Darwinism take its course then :p