Lots of people buy coilovers for the adjustablity, but they don't know how to properly adjust them or even why to adjust them. For a simple, effective, comfortable, street setup, I'd recommend a set of lowering springs on either stock or Koni dampers. Throw in some bushings to keep things where they're supposed to be under load, some camber adjusters, and a good alignment. Oh, and some good tires.
A stock FRS with just better tires has been shown to be capable of a 1g turn, so we have a pretty good starting point already. To simplify things, the bushings and springs will help with confidence and transitions. The tires and alignment will help with overall grip.
Take a look at @
Racecomp Engineering 's packages. @
Sam Strano and @
CSG Mike seems to cater to a more advanced customer, but they should be able to give you sound advice aswell.