Im wondering what would be the best kind of set up for me... im not much of a groomed trail person, i mostly sled standing up. I like to jump it as much as i can and im pretty ruff on it. Would a stiff or Softer suspension config. benifit me better?

a stiff suspension would be best. are you getting a new sled or want to put on a new suspension. personally i dont think a 340 is worth the money but if you looking to stay with polaris id recommend a prox 440(liquid not fan) or 600 as a new sled