One of the more recent 4 Wheel Off Road magazines had a winch chart that listed weight and size for the most common winches, it as a pretty good chart. If your looking for something that will pull you up a hill every few months I say go with the standard 9000 pound winch from Harbor Freight or wherever you find it cheap. If your looking for something that will recovery you quickly then you need to start looking at spending the money on a Warn or Superwinch.