I just found the forum and love reviving old posts for other new readers!
The correct winch size is based on 50% more than you currently can afford, seriously.
The capacity isnt about your vehicles weight, since you are not only going to be using it to winch your own vehicle out. Add gumbo mud, and a buried axel, a front end down in the goo and you are plowing an unknown quantity of weight. the suction created by the mud on your tires adds further psi you need to deal with drawing against the vehicle. So the winch needs to be able to pull the minimum of twice the static weight of the vehicle PLUS more... so in short a 9000 lb winch in reality is about the smallest that you can use... the idea of rolling resistance doesnt work in the real world... we deal with dead resistance.