In reply to jimtitt:
Well, how often do OPs mean 'best' when they say 'best'? Mostly, they really just mean 'suggest a <thing> to me'.
And which particular 'best' are we talking about?
Best value for money?
Best absolute warmth?
Best waterproofness?
Best pack size?
Best versatility?
Best street cred?
With no other information on the OP's needs, preferences and priorities, people can only offer suggestions to think about.
I'd say the Filo is on a par with ME and Rab high street offerings.