I already have put more than my two cents in on this thread, but I really want to point out something of a misconception common to this thread. The comparison of other sports helmets to flying head threats. If you come to Flagstaff, perhaps you will meet Clark. He flies a super Cub with 29's on it. He had an unfortunate engine failure on takeoff, which separated his wing and spraying him with fuel about 18 months ago. He is burned over 40% of his body. Had he not been wearing his helmet, he would have no ears, no scalp or face. He can quite clearly recall his visor burning in front of his eyes. He forgot his gloves, so his hands will need even more re-work than has already been done.
We had a forced landing in the NOAA King Air, very survivable. Everybody was killed by flying objects in the cabin. I have never seen a skier or mountain biker burning, although some runs have been described as smoking. The only sport that cares about impact by foreign objects is rock climbing. A helmet is not a bad idea there, as my son's former 4th grade teacher here can illustrate. He now functions on the level of a 10 year old after his unfortunate head/rock incident out at Lake Mary.
So as Lightspeed observed as he picked up the 182 door this morning. There was a helmet on the seat of my 185. In fact I just got one for my wife (34 years of marriage today! yeah!). She protested and said. "I don't want to wear it if it squeezes my head, oh, wait, this is really comfortable." It was kind of like driver's side airbags otherwise. It is the David Clark one, got a deal. However, use of helmets designed for biking will not cut it, nor will ski helmets. They have melting plastics in the construction, pure poison. Again, meet Clark, you can see where his straps where, good skin.
We all have no problem shelling out an extra $5-10,000 for a new car. It is the cost of the safety equipment, airbags, ABS, side impact beams, crumple zones. So what is a few hundred on your brain. So what if you look like a dork. I kind of like being different. While everybody was wearing love beads with Jesus hair and bell bottoms being cool (and looking all alike). I was learning to fly in the military. They are now fat bald leaping gnomes on medicaid with high blood pressure and I'm still flying, playing the dork, gotta love it.
Protect that melon, unlike kidneys we only have one.