Why? to get a heavier platform out the box? That performs no better on track? that seems silly. I do agree a c6z looks much better though. Not a C6 though, I just cant convince myself to like a c6 without the wide fenders....
I like my c5z enough to play with it awhile longer. Though, not to say I wont put a feeler out on my car again, and trade up to a c7.... though the wife will give me endless amounts of grief about it, like wives do... (she has been complaining about getting a new house for over a year now, if I show up with a new toy first, she wont be happy ) aka, poor people problems.