Piers14, a member here, has a serious road race car. It's a JDM one, so it has a KLZE, and he's done a lot of modifications to make it quicker. Lightened it, roll cage, KSport Suspension, EvoVIII brakes. The things eats Lotus Elise's for breakfast, and Porsches for lunch on a road course, pretty fun to watch.
YouTube - Porsche Trackday Mondello 14th Sept 2007 MX-6 Sess5
Another member you may want to talk to is
Ryan, he's got his car set up for autocross, it's also an impressive machine.