Opinions on rear spring idea

i dont know if i would put XHD's in a 4 door car...its definatly gonna give it some rake which imo will look stupid on a 4 door...for some reason some people think factory springs are inferior and adding a leaf is a "quick fix" LOL...imo, unless the springs you have are rotting or cracked or you need to step up to a performance spring like SS springs, adding a leaf at the spring shop is the BEST fix...I doubt your gonna be able to find new springs for less than 150 each