i lowered my car, but even w/ a camber kit 'm leaving mine a little at a negative side
it increases the cornering abilities. i take pretty hard corners but i also know teh limits of my car so i dont go very close to it. I just love the way it handles on wavy road.
and it doesn't really hurt my tires that much.

*again the only reason why i'm leaving it at negative camber is for better cornering, but if ur not into it then just get is as close to straight as possible.