I've got the Shark Evoline 2. It's pricy, but I love it.
I rarely ride with the chinguard up because I prefer the protection, however the convenience of flipping it up to talk to someone or get a drink is great.
Vents in the chin guard and top seem to do well, noise with chin/visor down seems to be about average.
The internal sunvisor doesn't seem dark enough but sure beats pulling off the road to put on sunglasses. The mechanism is simple and effective (I've seen other helmets that use a springloaded switch on the side to drop the 2nd visor fail)
It's a good looking, good fitting helmet. Be sure to try one on, the cheek guards are pretty snug. I had to cut some padding out of the ear pads to get my new UClear HBC100 earphones to stop squishing my ears (review on those coming soon)
Shoot me a message if you have any specific questions.
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