Definitely get the fully adjustable suspension. Lower the sucker by about -4/-4, add on aero kits. The biggest problem is getting more top speed out of it; I'm going to have to go with a fully-tunable tranny to push any more out of it.
I don't have too much problem handling this car, but it can oversteer some, so some camber on the rear especially can help a little. It's nose-heavy, too, so I tend to adjust brake bias to 5/7 or thereabout to keep a little more weight in the ass when it's cornering.