without trying to upset die hard loyalists on this forum...
at the end of the day the car you might be looking for is next year's mustang with the 5.0 coyote engine...i don't know how much weight it will add to the gt but it's speculated to come in around 400 horsepower
all i know is that i love my SS and couldn't have asked for more in my first brand new car
that's my 2 cents