19/20" wheels on a ZR-1

[Quasar Z]

Decided to make the change from the CCW Classics to the CCW 505A's. Wheels are 19x10 and 20x12.5 with 295/30/19 and 345/25/20 out back I think they turned out great and John at CCW did an amazing job. I ordered these March 15th and rec'd them today all mounted and balanced (keep in mind they had to be made, John ordered the tires, mounted and balanced, shipped, etc.). Just to give you an idea of what kind of service John provides, I called him to discuss the front tires since they bulge a little and may need a wider wheel. John say "no problem, let's get them back here and try an 11" wheel." I have bought a lot of aftermarket parts for my cars and have never had the level of service that I have gotten from CCW over the years.
On a side note, I may end up having to go with 20" wheels in the front to get the tire diameters closer. The current difference in diameter between the front and the rear is .7" and even that is resulting in the Service ABS and Service ASR lights. I will probably need to put a 285/30/20 on the front which is virtually the same diameter as the big 345's. The back tires look awesome. The ride is not bad but I have coil-overs which smooths the car out considerably.
I think this dispells the notion the 20" wheels don't look good on a C4, although I am sure there will be some people out there that think this looks too radical. I think it turned out pretty darn good