Rep Power: 0

I am swapping from ground control for another set. I am going to put on either Tein super street ot the Flex setup with the EBDC unit. Is it worth it or what is better out there. I use my car for shows and drive the streets pretty hard but no racing. Also what other component can i add that will show improovement to handling the most?? Rear tie bar, front upper brace or front lower brace??