I tried on a bunch of different helmets this winter and found the Shoei GT Air 2 fit my head the best and had the features I was looking for. I finally managed to test it out on a few rides. The helmet is light, extremely comfortable, and the venting is as many described - I can feel the air flowing over the top of my head! The only drawback is that the wind noise is a LOT louder than I was expecting. From the different reviews in this thread, I was thinking I might not even have to wear ear plugs when riding. I have no regrets, but definitely won't be doing any extended riding without earplugs.
I should mention I'm riding a FJ09 with the Puig sport screen, so the helmet isn't protected from the wind.