I bought the gold edition and am extremely happy with it. The interactions with the human NPC is hilarious and the wildlife NPC are always around, giving you something to shoot or be attacked by constantly. I was on for 4 hours last night and only complete 1 side mission and 1 main mission because I lost track of time running around the forest shooting wolves, cougars, wolverines, skunks, deer, elk and drugged up hillbillies.
I saw a guy kill a skunk, get attacked by a cougar, killed it, then attacked by a hillbilly and 2 drugged up wolves, killed them, went back over the hill to get the cougar skin and found a grizzly. All happened within about 3 minutes. All the while, your partner NPC is running around yelling 'Murica and USA, USA, USA! It's freaking hilarious.