I currently have a 1999 Goodman 2.5 ton heat pump (sorry, that's all I know). The unit has been freezing up, leaking refrigerant, and cannot cool the house sufficiently in the summer (above 90 degrees). I'm having it replaced. One contractor wants to replace it with a Trane XR14 2.5 ton unit and standard air handler. My question is will I notice much of an improvement in cooling efficiency and will a newer unit be able to cool the house when it's above 90 degrees outside? That may be a dumb question, but that's why I'm asking the experts, I have no experience. One contractor told me that I would not see any difference since the unit is being replaced with the same size unit (2.5 ton). The contractor that wants to install the XR14 said I would notice a remarkable difference. Just wanting some advice. I'm replacing the unit regardless, just wondered what to expect. Thanks for any advice.