I've been looking at these also, specifically the Nexx XR1R Carbon. After checking numerous reviews, I'm gonna get a better brand like an Arai, Shoei or a HJC. The reason? Well, it would seem that the features are excellent, would appear very good value for money but the execution is poor and they wear really, really quickly. I've seen reports of visor mechanisms failing, collars and inserts wearing particularly fast and the plastics / finishing touches being cheap and fragile. I could be wrong, but for my £300-400 I'd rather not take a chance. Ian