I changed the front sway bar and did not notice a whole lot. I think the slaloms got a little better. But I went ahead and dropped the money for the new shocks and got those installed and the combination of those two make the stock suspension seem really crappy. I run the fronts at full firm and the rear I keep at one turn back from full firm. The seats have to be removed to adjust the rear so I don't change it very often. The sway bar is adjustitble but I have never taken it off of the stiff setting as I'm not worried about the daily commute being stiff. When I go on long jaunts, like to Danville, I put the front shocks on their softest setting or it becomes painful after about an hour.
If you replace both the shocks and swaybar it will feel like your driving a race car - which is GOOD!