Remember kids... always wear a helmet. (The almighty bikeradar helmet thread)

get the s-works. It's similar but has a big air scoop at the front that points at your forehead. If you wear the (optional) plastic peak, that directs air into the scoop.

otherwise I hear great things about catlike and giro

+1 to the S Works, it makes a huge difference compared with any other helmet that I have used. I tend to sweat a lot when I ride and that helmet keeps my head cooler and the sweat out of my eyes so much better, it's brilliant. I find that sweat is coming down the back of my head and behind my ears now.

BMMF, I get the stinging eyes too, it's a complete fucker. It seems to happen when filtering in HGV laden traffic I find, which is really handy.