I had a set, and sold them because of the weight. It's not true at all that all this style wheels are heavy, there are Watanabe and Black Racing, Panasport, Minilite, Ultralite and Minator, JBW and others that are all much lighter than the Compe. My 15 x 7 Compe were 8.3kg each, compared to my Panasports that are just over 5kg for 15 x 7 ... more than 3kg difference per wheel. I wasn't sure if it would matter, but you could feel the difference in handling.
I now have some Atara racing wheels that are the same sort of design, 15 x 9 et minus 13 and they are 6.4kg a wheel.

Considering these wheels are made by Enkei, I think it's a lazy design, it wouldn't take much to get the weight down.

Russell.