Air, I weight my 18's VX-8 off the tire and they weighed in at just under 22lbs so I don;t believe that website has accurate numbers. That being said, I know O.Z. in Miami and their wheels are second to NONE, also I do believe the Velox 17's weight a little (2 lbs approx.) more than the Kosei or OZ 17's.
Just make sure you get what you want to save yourself heachaches in the longrun. Don;t worry about the questions, keep em coming.
Eric