What is your definition of not sucking ? If I bought any of the cars you listed, if it needs a repair, where can it be repaired? And if it needs parts, where do I get them?
From what I've read the Z06 has been rated as one of the best bang for the buck. I think best is a broad statement... best in what, speed, performance, price, reliability and so for. And I'm no car expert but I think where a car is to be used has a lot to do with how it will perform (elevations, weather, etc..).