I can't say on dirt helmets because I've used Troy Lee's the last few years, but on the street I only use Arai. Seen too many injuries when using cheaper helmets. The extra cash is worth it for the safety in my opinion. Troy Lee helmets are a little cheaper usually and still up there in safety so i'd check those out too. I've had really good luck with them in conjunction with a Leatt Brace. Broke my shoulder and tore alot of muscles/tendons yet safe up top.