I'm going to install my own central air unit in my house. A friend of mine has a buddy that redoes houses, and he has alot of spare parts around. I can get everything I need to install it besides the refrigerant and duct work for less than $500 for a 3-ton unit. I can install it in either my attic or basement. With the attic option, my blower is not struggling to push cool air to my 2nd story, which seems like a definite advantage. I lived in a 3 story house and my bedroom was in the 3rd story, and it was always hot up there because the blower couldn't push the air up there. With the basement option, I can put the air handler closer to the compressor, and the basement stays cooler than the attic. Which would you do?