I'm considering either the 4 ton RTG Ultron 16 seer or RHF Temp assure 14 seer. Both would be mated with the AMV9 96% Amana furnace. I live in the Atlanta area. My contractor says both are nice units, but recommends the 16 Seer based more on comfort than efficiency. In particular he believes the 401a in the 16 seer unit will serve me better in the cold months, and I won't complain about "cold blow". Although it will not even out the cost, I was also wondering if the Ultron will qualify for the $300 tax credit. Any thoughts or advice would be appreciated.