big brakes, why not the 2012 Stang GT

Yep, Now that the Duster has the 360 in it, it needs some help.
I'm really talking about 5-6 hard stops on a trip to work on the weekend. The corporate plaza has some nice twisty roads and no cars to speak of on a Saturday morning :)
I'll most likely do the 11.75 rotor upgrade. It doesn't need too much help, but since it'll be a daily driver in the next couple of months I'd like to know the brakes aren't glazed when some jackamo pulls out in front of me.

Do the 11.75 inch swap with good pads like the ones firm feel sells, I don't think you will see any improvement by going to the Mustang GT brakes.