Re: 650HP Mustang direct from FORD!
Hopefully you're not buying the Jeep SRT8 for just raw dog power.
Hopefully you need the space and/or AWD for 4 season driving.
Otherwise, I can think of 12 other ways to go fast than an SUV.
2015 SRT Grand Cherokee Hellcat in Mopar Blue. Or 2015 Trail Hawk II
(If you build it, they will come!)