I would agree that the smith maze really is a great helmet. I tried numerous helmets on (pretty much all the more popular ones on here...) and none of them felt quite as good for me as the maze. It is INCREDIBLY light. Obviously, your experiences may differ with regard to fit.
Since you're also using it with IOX's, that's another reason to get it- the vents are designed to line up with the goggles.
The only downside is that because the shell is a one piece design, you are really supposed to replace the helmet if you smack your head with it on.