ditto re: safety--all the same as long as they are certified.

I currently use a LAS (it is what we sold at the bike shop I worked at and the giro did not fit.

In the past, the other helmets I have used--bell (it was great!) and specialized.

I don't know about anyone else, but--I've got psoriasis (anyone remember Sonny and Cher's skit: "The Heartbreak of Psoriasis?)--so, I require MANY vents to prevent my forehead from breaking out.

What I like about the las (aside from the fit) is that it has a liner in the helment that I can throw in the washing machine.