97 grn ss

I was wondering if anybody has any experience with oz wheels. Are they good quality.

These superleggera's weigh in at 18 pounds for 19 inchers. I want 18" wheels. The stock wheels weigh 19 pounds right? Should I get 17 or 18 inch wheels?

Does anybody have these on their car or any O.Z. racing wheels for that matter.

Since they are lighter I wouldn't lose any performance would I?

thanks a lot