Timely discussion. I just found that my inner liner separated from the outer shell by having three of the rivets and their receivers fall out along with the screw that stripped as I tried to put it on. Not that it wasn't too old anyway. I bought them (hiding head in shame) 12 years ago. HJC Symax (not the III or the II, it's an original Symax) and I bought it right when they came out.
So... Schuberth has a new one, but ugly, but integrated com system for $700+, but setbacks keep pushing the delivery date. Once com system is included is it more in the $900 range.
4:
Really like the Shoie Neotec modular with the hi viz yellow striping, again in the $700 range.
The side attached com systems similar to Sena 10/20 have been defined as illegal attachments, so integrated com system is a must, which really narrows the field. The two helmets listed above are "top of the food chain" helmets with prices that match.
Head shape is important. Oval or round makes a huge difference in comfort and feel. I chose my last helmet because it just "fit". Shell materials and the type and densities of inner linings make a safety difference. Air flow and ventilation become important on longer rides. Anti-fogging shields if your weather includes that concern. Washable liners... because I sweat and don't like the "funk".
What I'm gleaning is the the more expensive helmets are better across the board in comfort, quietness, and ventilation, made with superior materials. That doesn't necessarily make them "safer", but more comfortable, which inevitably leads me to safety on longer rides. Anything helping fatigue helps me.
So... is it how much money I can save? Or am I missing an obvious choice?