the SRT6 brakes won't stop you any faster than the Limited brakes.
they are just more heat resistant and won't fade as easily.

I installed the Posi stop ceramic pads on my limited and also dimpled and slotted rotors. I can now do 8 sets of 80mph-10mph emergency stops without fade, well maybe a little fade on the 8th stop. pretty damn good aye? not to mention the SRT6 brakes are heavier and that extra weight sucks hp and isn't good for suspention, for the street the OEM brakes are supperb!