Poll is not so good because you say 'Martin or Harden' in the title and in the first message you add 'in a 3pt contest'. That added criteria changes this completely. Lots of people voting who is the best player and others on your added item. KM would prob beat JH in a 3pt contest but as a player Harden is an offensive machine to a degree that KM never achieved.
Why not Martin close to his prime as bench scorer if attainable Harden is more clutch and has an NBA body
