Yeah, these are teh 19"s you saw I believe. They just look a little busy to me on the car.
http://www.svtperformance.com/forums/showthread.php?946654-Ordered-New-CCW-SP16A-Hybrid-for-my-GT500
I agree, and I don't think the smaller size is helping. I think the suble look of the fewer spokes of these SP540s and 1" bigger in diameter should help them a bit. Hopefully! Expensive gamble.