You should go pick up a bern hard hat. I had quite a few falls this season trying new tricks in crapy conditions (super icey). And so far I haven't had a concussion this season (been out 25 times this season).
Personally I like the hard hat because even when you catch a edge (for a stupid reason, like being lazy with your turns), a small crash won't requrie you to buy a new helmet.
Ive had a about three hard impacts this season, in which the back of my helmet hit pretty hard snow, and my hard hat is still good.