ah but one thing- which is going to be more practical for you? EPS foam is the industry standard but the only helmet i would ever again dare touch, that has EPS hard-pack foam, is a RED hi-fi. otherwise, i really like the idea of the reboundable brock foam.
let me explain:
there are a plethora of helmets out there that use EPS foam as the norm as they are ''extreme sports approved''.
i had a leedom with EPS and because of the hard shell and the nice comfy thick warm liner, i couldnt actually see that the foam had cracked and thus was not of value to me in the event that i would bonk my head. which i did. again. and i was out for 3 minutes. when i came to, the ambulace had already got the meatwagon prepped.
the hi fi from red, however- the plastic overshell on that thing is so thin, that when i overspun switch backside and caught an edge and went down hard, the helmet split right in two, plastic shell included- did the job and also gave me no illusions as to whether or not i could still use it.