I'd agree with BONE... upgrade your shocks to Koni Yellows or if on a budget, KYB AGXs. An adjustable shock gives you a much wider scope of tuning in terms of matching shock damping to road conditions and driving style.

Also, the stock shocks will probably wear out faster with the Pro-Kit, as they can't properly dampen a spring that is much stiffer than stock. And nearly all lowering springs have to use increased spring rates to make up for the loss of suspension travel.