When I first got my SRT, I was disappointed with how harsh the ride was when going over bumps and especially railroad tracks. Some suggested that you just have to put up with it, "after all it is a sports car". I have driven a lot of sports cars and know the ride does not have to be that way. Finally, I broke down and bought some Koni's. I left the springs since I am satisfied with their performance.
The difference has been immediate and remarkable. The Koni's really make a difference. Performance on a tight road course is as good as it was, if not better. They are expensive but worth.