Id go with turbo....


NOS Con: Large amoung of explosive gases sitting in near you......
Can explode causing large expenses of damages to interior & body
Can Cause severe internal engine damage
Hard to sometimes use properly


Turbo Con: Can breakdown, but can be fixed.
Can blow, but do less damage (mostly no fire damage like nos can cause)
Can cause engine damage


NOS Pro: Boost of power when needed....


Turbo Pro: Adjusted, constant accesable boost.