can i ask, what part of the ride is too harsh?
i would say swapping to 13" tires with more sidewall (if 13" wheels will fit) would give you more cushion without compromising the safety. You could adjust tire pressures to make the tires absorb more road..
being i drive the same car, stock, it was not either too bouncy or stiff. but i want to know what you are trying to "fix"