The FIRST response from Skully about what he wanted was a "panic stop" situation. For that you would want organic brake pads, not metallic or high temp pads. The later usually work best after they get some "heat" in them. Another concern would be: power or manual brakes? If manual then organic for dam sure on a cold morning with cold brakes especially. The pedal pressure required for a panic stop goes up substantially as you move from organic to metallic to race pads.
IF you can "lock up" the brakes with ONE piston calipers why do you need SIX piston calipers? "Modulation", a better "feel" for impending lockup without actually locking up the wheels. Doesn't mean much in a panic mode stop though, your likely going to lock them up anyway. Bigger brakes will last longer, on the track, not necessarily a big deal on the highway. OK, unless your pulling a trailer down a long steep grade (unlikely with a Cobra).
So you need to find the right balance here between full blown race mode and reasonable street driving mode.
Myself, I switching out to high temperature race pads soon. And I have MANUAL brakes! I'll have to be darn careful in the morning, on the street, until those brakes get some heat in them. I will have a lot more pedal pressure to deal with as well. BUT, I'll be doing enough track work this summer that I need to prep more for the track, less for the street.
"Bum Steer"??? HA HA HA, I think you mean "bump steer", which is good to have on the TRACK, ok, it's nice to have on the street as well, but it's not a huge deal (usually, depends on the car and it's factory setup). Some need it more than others.