Recently bought a Shoei Neotec modular and find the ventilation to be excellent even behind my XR's windscreen. Full open, the top vent does a great job of scooping in the air. If the quest has similar vents you will be pleased.
2010 Midnight Cherry XR. 7Jurock, Lloydz AF, ATS, AFR tuned VFCIII, IAV, and T-6 and locally repacked pipes = big smiles. SOLD to a dear friend, so it's still in the family."
2017 Spyder F3 Limited - keeps this old guy in the wind and riding with friends.
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You will find most medium to high line helmets have adequate ventilation ports these days. What I suggest you look for is the right head shape. I have a Shoei and it is the worst I have every used when it comes to noise at highway speeds. Over the years it's buggered up my hearing but it's too expensive to trash so ear plugs need to be worn. The proper shape (they have three I believe) will help keep the wind noise down. If you can, take the helmet for a test ride before you buy.
Looking for a full-face helmet with good ventilation. Have been looking at the shoei qwest but still looking around. What do you guys think?
Personally, I'm done with the experimenting on helmets. I've had cheap ones that fit poorly and rattle, I've had other expensive brands that had poorly designed features and breaking plastic parts. I've owned a bunch of Shoeis and they've always been excellent in every way. They also fit my head perfectly. I tried on a QWest earlier this year and the thing went on like sex.
I want one too!
I think their GT Air is their current gold standard for the venting. Frankly, I'm not sure how much difference those little cool slivers of air running over the top of my head make. If I need ventilation, I open the visor.