If you can afford a proper one, try and get one that will allow attachment of a HANS device.. (going forward this is the direction I will be going in in future) although its expensive, it will cover you going forward, I will be going for closed face so I can use it for karting and open wheeled stuff.
Have a look here, or demon tweeks etc
https://www.merlinmotorsport.co.uk/s/racewear-helmets