[3.5litermoose]

if your going to lower in the future, definately get some bilstein sport shocks, or maybe KYB. For springs it all depends what you want. you could go for some race springs from that will stiffen the hell out of your ride and really make you turn well, but that would cause the filings in your teeth to rattle out when you hit a bump.
Some places with less stiff springs that still give good performance are H&R or einbach. These will lower your car, give you a stiffer springs, and still give you a fairly comfortable ride.