The folks over at Free Money Finance have an article on how they recently changed out the furnace and AC system in their home. It’s important to note that these folks are in the north, where heating is the primary concern. Thus they ended up with a 13 SEER system. Here in the Buda, Kyle, San Maecos, New Braunfels area of central Texas, we recommend 16 SEER or higher due to our long cooling season.
It’s an excellent article on choosing an air conditioning contractor.