whoisrawb,
Well, in case these guys haven't talked you out of a full face helmet yet I'm gonna recommend a Scorpion exo- 410. It's similar to the helmet Dave mentioned except that it hasn't got the drop down internal sun visor.
I bought mine a short time ago and broke it in on a just under 1000 mile, three day trip, three weeks ago. So far I like it a lot.
The features I like, in no particular order, are these:
With the vents closed it is the quietest helmet I have ever owned. I normally wear ear plugs but when I wear this helmet around town, and speeds under 50 mph, and I can ride with the vents closed, or even with just the chinbar vent open, I've found I don't really need the plugs.
With all the vents open, and on long rides at higher speeds it's still noisy enough so that I'm more comfortable with the plugs. With all the vents open the helmet flows enough air to be comfortable. The hottest day I've had it on so far for any length of time was around 80. If you ride where it gets hotter than that I don't know it the ventilation will be sufficient or not.
There is a little lever on the left side of the helmet that pushed one way locks the faceshield shut and seals it against the gasket. Push it the other way and it opens the shield about an eighth of an inch or so and holds it there. It provides just enough extra airflow to keep the shield from fogging up. Of course you can open the shield further if you want also. There are, I think, three intermediate detents between all the way shut and all the way open and they are strong enough to hold the shield where you put it. The shield is also very easy to take off and put back on.
The cheek pads are designed to accommodate glasses which is important to me since I wear them. I've had helmets that got uncomfortable with glasses on after a while. This one is fine.
The helmet is both DOT and Snell approved if that matters to you. I don't race (anymore) but for anyone who does, or even just does track days, that might be a consideration. Some places or sanctioning bodies won't let you use a non Snell approved helmet.
What I don't like:
The helmet I bought came with a clear shield so I had to buy an extra dark smoke shield so that I don't have to wear sunglasses - I have clip on sunglasses that go over my prescription glasses, and that's an extra layer of plastic that I'd rather not have to look through. The replacement/ extra shields are around 40 bucks, which is kind of steep I think. Especially since you can find the helmet on sale for around 140- 160 dollars. The plain colors are cheaper, the fancy graphics are a little more.
None of the local dealers stock them so I had to buy online without trying the helmet on, or even seeing anything but a picture.
If you buy a helmet, especially a full face helmet from an on line vendor, make sure you can return it for a different size or even a completely different lid if you don't like the way it fits. Not every place will let you do that. Be especially careful if the helmet is on sale or on "closeout". Sometimes the regular return policies don't apply to sale or "closeout" stuff. A lot of the reviews I read before I bought my helmet said that Scorpion helmets tend to run a bit small. I took a chance and ordered my regular size and it fit. But everybody's head is different.
Anyway I think this one is worth looking at. Good luck.
http://www.revzilla.com/motorcycle/scorpion-exo-r410-helmet?utm_source=produc...