What helmet do you have at the minute?
I have just come from a Met Kaos and a Veleno, which I replaced a Giro with, back to a Giro Xar. The Met helmets I had gave me headaches. Now I’m back on the Xar I have none of that, and I’m really happy with it- it was about £50 in a sale, it’s much better vented than a lot of the enduro style helmets like a Troy Lee and it’s light. However, if you currently have a Met or a Bluegrass and it’s comfy it probably won’t suit you. Conversely if you currently have a Giro it’ll be great, and Met/Bluegrass helmets will be uncomfortable- no one in my riding group gets on with them.