I have the Eibach Pro Kit springs in my car, but I am thinking of going to something a little less stiff in the future. I am doing a Global West negative roll conversion with the tall spindles, and they recommend softer springs. While my springs are better than stock, they can be a bit harsh--even for me. For suspension parts, try the major suspension companies like Hotchkis and Global West. There may be a cheaper solution, but their sites would be a good place to start.
Also, if your car does not already have them, get the big sway bars off a car with the optional FE-2 suspension package. They are 1.25in front and 7/8in rear and will make a very noticeable difference for a small cash outlay. You should be able to find a set used for under $50 at a local U Pull It junkyard. Be sure to grab all of the hardware when you remove them as they have some unique pieces that you will need to do the conversion. You also may want some new shocks. While Konis or Bilsteins may be the best, they are expensive. So, I would at least get a set of Monroe Gas-Matic's as they are a little stiffer than the cheaper economy shocks. Doing these two things and leaving the springs stock would make a marked improvement in the way the car drives with a minimal amount of work. I went this route when I first got my car as I did not want to do all the work to swap springs, but did not want to drive a water bed either. Just be sure to do BOTH sway bars if you do, since either by itself will change the handling in a way you may not be ready for. The front by itself will increase understeer and make it more difficult to change direction, the rear by itself can make it more likely to come around on you. You may not have a problem, but I would just do both as it is the best setup.
Also, if your car does not already have them, get the big sway bars off a car with the optional FE-2 suspension package. They are 1.25in front and 7/8in rear and will make a very noticeable difference for a small cash outlay. You should be able to find a set used for under $50 at a local U Pull It junkyard. Be sure to grab all of the hardware when you remove them as they have some unique pieces that you will need to do the conversion. You also may want some new shocks. While Konis or Bilsteins may be the best, they are expensive. So, I would at least get a set of Monroe Gas-Matic's as they are a little stiffer than the cheaper economy shocks. Doing these two things and leaving the springs stock would make a marked improvement in the way the car drives with a minimal amount of work. I went this route when I first got my car as I did not want to do all the work to swap springs, but did not want to drive a water bed either. Just be sure to do BOTH sway bars if you do, since either by itself will change the handling in a way you may not be ready for. The front by itself will increase understeer and make it more difficult to change direction, the rear by itself can make it more likely to come around on you. You may not have a problem, but I would just do both as it is the best setup.