Is the 4.4 still under the 50k mi factory warranty? 43k mi doesn't leave you much room for any warranty items, but it does give you a little room before the CPO warranty kicks in.
Is the price the same between the 4.4 and the 4.8? Given both are CPO and within the same general mileage I'd go with the 4.8 if the price is the same.
