The design of my basement:
Concrete foundation to 6 feet tall on 3 of the 4 walls
2x6 16 inch OC studded walls on top of the wall to the joists above
I added a decoupled 2x4 16 OC inner wall that varies from 1.5 inches to 2 inches from the concrete/2x6 wall. The 2x4s are staggered differently from the 2x6s. The 2x4 wall is decoupled from the original wall and the joists above.
It adds some insulation expense, as well, as I have to fill the 2x6 cavity as well.
In the end, it will be worth it!