Here in North Carolina I don't have a basement. However, when I lived in Chicago I did. I went one step past a sub floor. I laid down pressure treated 2x4's's every 12 inches on center. On top of that I laid down a sub floor and then a combination of tile and carpet with padding. I used the carpeting in the kids play area and the tile in the bar and pool room. Using the 2x4's kept the floor warmer during the winter. I also had 8 1/2' ceilings before I finished the basement.
Das Leben is zu kurz um schiess Bier zu trinken