I ran a few times on the track (Sebring and PBIR) with my car STOCK...I was a bit of a novice I must say, so the feel of the vehicle I felt was more driver imput. As I felt more comfortable on the track (and rode on some 911's) I started to feel that the E-92 had just a bit too much roll and understeer. (in adition to terrible stock pads and NO exhaust tone!).
I went to Active and went with their full x-pipe / exhaust system (sounds amazing on the track) and for the time being (also saving my $3K for P-Cups) I went with the economic option and slapped on some H&R Sport Plus Springs from Turnner.
I've taken this set up (along with new Pagid yellow pads) a few times over to HOMESTEAD and love it! Car feels a lot better. I figure once my shocks start to go I'll move to KWs, but for $300 + Install the HR Sport Plus are a great bang for the buck, especially on the track!