Edelrid Salathe Lite - the best helmet is the one you'll want to wear

EPP helmets don't tend to come cheap. The Salathe Lite's retail price of £110 is the same as the comparable Petzl Sirocco, but significantly cheaper than the BD Vapour. Lightweight, well-vented, and decent value: if the Salathe Lite fits your head then it'd be an excellent choice for all your climbing and mountaineering. Being so light may be an advantage for scrambling and winter walking, too. It's a helmet for pretty much anyone, in other words.