You wont be able to do that with bags even coned shaped bags wont achieve that lift, both those cars have hydraulics.
Personaly i would go with the slammed on the floor look on an Ls and buy some big rims, that way when you park up you can drop the car and get the wow factor when your driving you can adjust the ride height to suit. You will need some room in the boot for a tank but there not that big for what you need.
Try and find some pics of one with bags on someone in the states must have already done it then you can see what you will get before parting with any cash.