Most HVAC companies recommend a 3 ton heat pump for my house. If I went to a 4 ton unit - does the winter temperature of the balance point lower (any idea on by how much it will lower, 2000sqft house in PA)? I know my AC will short cycle - I do not care about this, I'm looking for the most efficiency in the winter months as heat is on for more months than AC. The unit will be a dual stage Trane XL18I. Are there any other drawbacks of over-sizing a heat pump? Thanks.