Best thing I can recommend for you is to visit a local shop if possible and ask to try a few things on, if you don't have a local shop then ask around some players at your field and try on some of their masks.
Most people will be cool with it so long as you ask nicely and explain why you want to try on some different masks.
This'll help you make a more personal decision, for example: I think the i4's are really nice however while wearing them my chin sticks out the bottom of them when I open my mouth.
That's not all too great in my opinion but for someone with a smaller head they could be perfect.