squishbang

I agree w/ Mr. D. regarding your choices.
Part of the reason I went with the Ford Racing kit was because while I will go very far for better handling I'd like my wife to ride with me occasionally. The Ford Racing Handling Kit seems to have hit the sweet spot. The ride quality isn't any worse than it was before we installed everything in my opinion.
The big differences: the car hooks up faster and the nose of the car doesn't raise during acceleration. Car stays pretty flat in hard corners. Most importantly the car is neutral.

Mr. D

Sounds good to me! What's not to like. By "neutral" do you mean in over/under steer or in front to rear movement?

squishbang

mostly in terms of over/understeer. the nose still dives under hard braking but I don't perceive that as a big deal. It's not huge and used properly you can take advantage of it to rotate the car.

Mr. D

My '08 supercharged GT twisted a lot at 460 HP before I installed a shock tower brace. Does anyone know anything about whether the 2015/16 GT needing extra struts such as a "shock tower brace" to keep the body from twisting under the torque of a supercharger (670 HP)?