In your situation, I would apply for a transit visa.
You can still go out of the airport on a transit visa
The primary reason for you being in the US is transit, so it's a more truthful visa application
I am pretty sure that a transit visa is easier to get (i.e. lower chance of denial) than a toursit visa. A visa denial looks really bad on your record. Better to get the easier visa first, and then get a tourist visa later when you really need it. At that point, you will already have international travel on-record (including a transit via the US) - it would be a stronger tourist visa application at that point.