Looking at one of these Polaris Pros or Assaults? Think correctly? Anyways it’ll will be an 800 so I just want to know the changes though the years big or small. Is there a certain year I should try to buy? Is there one year that weren’t to good? Just inform me on what’s different, specifically the 11 vs 12 vs 13? Also whats the difference between the pro rmk and the assault rmk? Thanks.