Or you can shave your head every day like I do.If you shave your head it works well until it starts growing out but then it's like trying to pull apart velcro to get the helmet off of the stubble. So you have to wear your helmet a while longer until the hair grows enough to be flexible.
That's because you live in Kansas, If you do that where I live you will have mildew in about the same time and your head will smell like a very old sock.I have always had that problem, and I started wearing a do-rag thing under my helmet to absorb the sweat and keep the helmet interior cleaner. Last year I got a Shoei 3/4 hellmet and had much less sweat. Once, on a hot day, I wet the do-rag before i went on a ride, and was amazed that after about 30 minutes the do-rag had dried out.
The Shoei hellmet was more expensive than the helmets I had been wearing, but it is easily worth it.
I would suppose the ventilation on any of the Shoei helmets is the same, but I dion't know for sure.
I also have a nolan 102 or 103 and am very dissapointed with the lack of ventilation, but like the communications.Of course the 3/4 helmets let in more air, but also more noise, and less crash protection
I had a arai classic that was a nice helmet, good air flow
I had a n42 nolan with the two shields, nice helmet but very warm, poor air vents, couldnt notic ea differnce from open to closed
I now have a xd-3 Arai, dual sport helmet, real good protection and air venting, long top visor almost cuts out the need for sun glasses, very quiet, but it does fog up on rainy humid days
Arai seems to fit my melon perfectly
Studies have shown that color really makes little difference in interior temperature for a person's head. Between the insulation and comfort padding the temperature difference is pretty much nil. Best bet is to open the ventilation tabs on the helmet. Some are better in this ventilation area than others.A light colored helmet will help in the sweat and heat department.