Re: MAD MAX!
I'd use GURPS for its ability to handle mental and physical disadvantages, its point based system allowing non-traditional character concepts, the ability to break limbs or dismember in combat, its systems for vehicle combat and social engineering. I'd probably turn up quite a few of cinematic dials to attain the right feel and boom! Bob's yer Uncle!
Also, thought the film was great. Though...I didn't really think of it as a reboot more of a continuation...in the same way that just because they recast the Bond actor doesn't mean it is a reboot.