I am going to place an order for a new Caliber. I am trading in my '01 Ram 4x4. I would like some opinions on FWD vs AWD. Is it worth going the AWD RT? I was considering the better mpg on the FWD models but I live in Wisconsin and am used to having a 4 wheel drive. I am looking for advantages and disadvantages. I have heard that the tires wear faster on the AWD and you have to replace all together instead of just one or two. Any other issues or concerns?