Those are pretty sweet. I bet they are much lighter than stock. Can you tell the difference performance-wise? Think of how nice that Z would look with some Panasport look-alikes.
The beauty of the CE28N is that it is a forged monoblock wheel, ultra strong and light. The 19x9.5 weighs 20lbs
I'll post before/after weight pics soon. The Volks are lighter than the OEM 18's, but the S-03s are heavy tires.