the problem in this hobby is there seldom is an all encompassing 'best' of anything
fundamentally - what is best is often in the eye of the beholder. even when you define it as 'most game accurate'; translating what looks good on a pepakura viewer, may not transfer into pep skills. Then tehres the degree of detailing you are gonna want to add to your helmet.
the members here arent tryin to be difficult by asking you to use the search button and research yourself. Its often that theres a decision that you are gonna have to make yourself based on your skill level, how much time money and effort you can put into it and lots of other factors.
I used rundowns. but there are loads of others.
Welcome and feel free to research before posting a thread - as if you have encountered a problem, its more than likely someone else has too in the past. And to be honest, all answers here will be opinions rather than fact as different individuals will have reasons for liking/disliking a model.
Nate