I grew up with the saying , "buy the helmet as how you value your head'.
Yes, helmet price ranges from dirt cheap ones to uber expensive ones. But the bottlm line is that you get one that is certified or branded. Those would have the R&D done together with proper QC, and some even being used by racers around the world.
What you are paying for would be those R&D work, certification, testing and the anything above the minimum would be weight savings, comfort-ability, air flow, design, graphics, aero dynamics etc. Wind noise doesn't factor in because they are not a win win item, the more holes in the hell of the helmet for air flow, the noiser it will be. No two ways around it But that doesn't concern me as i wear ear plugs.