I would say DNS.....or for under $400 Robert at PWC had a great fiddy (not sure if hes sold out as it might have been a limited addition).
In my opinion I would be careful to get a Fiddy with either no AR or with good AR (DNS does good AR I believe) Average AR has a blue-ish tint....which is a dead give-away as to it being a rep, something thats noticeable at distance ie across a room and shouts FAKE. Authentic Pam wearers would find it odd if they spotted a blue tint, unfortunately its unavoidable when it catches the light...For $600 I would expect pretty good AR or I wouldnt buy it...