Hi all I have a cheap helmet which was fine for the past couple of years, but now I'm changing the bike I want to replace it and am somewhat bewildered by the choice and price variation. Is there only one standard that all road legal helmets have to confirm to or are there several ? Is a helmet costing £300 plus be safer than one that costs £100 ? Is there a comparisom website where I can compare weight, noise etc before I start trying a few on ? Recommendations ? Thanks in advance GM '86 K75c (still for sale)