Montana, that's a good thing. If you are looking for a dually then there is a reason. Probably that you are going to tote a load. All the big three that you will be looking at will generally be at 14K. Yes, they are all good. And they will all pull the ox off a rooster. And no, one will not pull more than sox then the other one. Buy the one that is in great shape, as low mileage as you can find, and in your budget. And it is a plus factor if Momma likes what you decide on!