I purchased the Mugen N-Zero after not liking the Comptech adjustable springs... I don't feel that you can just put any springs on any dampers: the stock dampers are designed specifically for the stock springs. If you want better performance, matched sets are always the way to go. Even better: a fully adjustable set. My Mugen coilovers are height adjustable (independant from spring perch), spring travel adjustable, and damper rebound adjustable. I have barely been able to touch the surface of the number of combinations possible. Plus, I don't have enough experience to really know what I am doing... AND every major height adjustment requires a new alignment.