Think less about bulk and more about weight... Look at something from the sweet protection range and if you can afford it, then certainly get a carbon fibre helmet, the difference in weight is massive, i forget i am wearing a helmet with my Sweet Grimnir...
Height 5"11, Weight 200-210lbs, Born 1969
Regular Stance, Ability NOT GOOD
2012/13 114 days
2013/14 102 days
K2 Fastplant 154, Ride DH2 158, Endeavour Vice 155, Signal OG 155, NS Evo 157