I had to try on a lot of helmets to get the right fit because helmets didn't fit me right. The Tipperary Sportage works great for me at about $75, more or less. Plus it has a lot of vents so it's comparatively cool. I also tried on the the One K, it had fancy bells and whistles and it was like heaven, really cushiony and secure. But it's about three times the money. So that'll happen one of these days...maybe.
I think the advice about trying on is real important and you should take the time to go to a store and do it..because for example - for me, the troxels, etc do not fit right. They feel awful on my head. Every head has it's own different shape and some, like mine are very oval if you look at it from overhead. And comfort is so important - comfort means fit and you want one that's going to sit properly if you should take a spill.