Just depends what you're trying to accomplish. If you are interested in ride quality then you should invest in a split mono-leaf spring. Any spring pack has a lot of internal friction from the leaves sliding over each other. That friction is what creates the ride harshness since the leaves stick at first then slide. It is all very non-linear behavior which you feel as "harshness". Try some Calvert split mono-leafs on your car but leave the front pivot and link bar off. Just use the springs and then a snubber or whatever else you currently use to control the wrap. Buy a high quality shock and you'll have a nice system.
