I think of all the gear that I tried on in a store, my helmet was the hardest decision. Much longer even than boot fitting several boots. Almost as long as molding and custom footbeds including the fitting :shock: Just tried them all on, narrowing down the field, and then had about three or four I was going back and forth on, leaving them on for a while, etc. Seemed like forever before I finally felt confident making a decision. So definitely get to a shop and try a bunch on.
Here are a few key things you'll immediately notice that will better allow you to narrow down the field:
Full dome or more open field of vision: some helmets offer full coverage while others cater to the park and jib crowd with more open feel.
Ear flaps or no? Removable ear flaps are nice for spring skiing.
Plugs, vents, etc. How do you want to vent the helmet. Some helmets vent with just the slide of a switch, others you need to take the helmet off and remove plugs.
Integrated audio: If you are into that sort of thing....
Those are the easy questions that should allow you to narrow things down a bit. The fancier options cost more. Fit matters most though and don't forget that helmets pack out slightly. You don't want something too tight but definitely don't want a loose helmet either.