you could always go with shorter stiffer springs, that will reduce suspension travel even more.
i personally like the griggs starter kit. its the a torque arm bar set up for the rear suspension and puts all four corners on adjustable coilovers.
http://www.griggsracing.com/product...d=603&osCsid=0d49c32d694ee9904ab9541fdd9bd346
griggs spent almost 18 months for r and d on the s197 mustang. all of the reviews i have seen on this set up have been great(though i have not seen a review for this specific kit).
2007 Factory Top Stripe Delete