It's a personal thing I would imagine HH and very dependant on your driving style and needs. Some are willing to pay for marginal gains. In most cases though SSL upgrades provide noticeable gains from the instant you set out with new kit, the oft repeated comment being "this is how the car should have handled".
SSL being suspension specialists are quick to identify shortcomings in our cars and offer solutions. Suggest you speak to either Peter or Dan.
Just a happy customer BTW.
