I ditto this comment however your spring rates will be the factor in how comfy your ride is, not so much your sway bar. from what i gather if you were to purchase the 28mm bar you wouldnt need to rely on your springs as much to keep your car from rolling during corners and thus you can choose a lower spring rate which wont be as harsh under normal straight driving; and visa versa . . . as is mentioned just above, get down to any motorsport involved companies/shops and question them about itm and if possible have them set it up for you . . .