.
if you want a firmer ride and less "wallowing" in the car, i would buy kyb gas adjust.

if you are taking corners in a spirited way, i would buy maier racing revalved bilsteins.
 

The Bilsteins are available in three valving configs, "Street, Sport or Race". You can also get them from Street or Track and Shaun over there could give you some sound advice on which valving to go for - send him an email and he'll call you. The Bilsteins are good shocks and worth the xtra $ over the KYBs imho. I'd consider putting them on the back in the same valving you pick for the front too. fwiw Mike Maier has split from Maier racing and opened his own shop - Mike Maier, Inc - a lot of expertise walked out the door at Maier when he left. The stuff Mike is focusing on at the new shop is a little more esoteric and he's been using JRI shocks in his coilover systems for awhile, they have some advantages over the Bilsteins but that's a whole different ani-mule. . . not sure what's going to happen with the old Maier Racing as time goes by, not so likely to see new product development there I would think.