Best value 1/2" impact

Currently I have an electric impact that does fine but putting a lift in my YJ has so many places where this thing is way to big to fit. I currenly have a 20 gallon verticle portable Craftsman air compressor and plan to move to the Campbell Hausfeld 60 gallon shortly. I want to know what is the best 1/2" impact out there for the money. I don't care if I am paying $60 or $200 I just want to make sure I am getting the best bang for the buck. Ultimate torque is what I want. I don't care if it shakes my fillings out. I likely will use multiple times and then it may sit for a couple months at a time.