As for the Ford GT, you can check about any comparison model out there, and they've done this a few times....the ZO6, the Viper, and the GT. Every time they'll tell you that the BEST car for the money is the ZO6. EVERY. TIME.
The GT should handle better, as it is a 200,000 dollar car! Still, it's built for top-end speeds, and it's bottom-end numbers suffer drastically. If you want a car to go 200+ miles per hour, then you'd better own a speedway, as it's the only place you'll ever make it to that speed...and it takes the GT about a half a mile to rach that peak speed!
The Viper is all muscle, but it handles like ass...always has. It's more affordable than the GT, and it has more hp than the Z06, but it doesn't handle near as well as the other two.
The Z06 is the all-around go getter. It handles better, it's the cheapest, and it'll perform both 0-60 and 60-MAX.
I may be a littel biased, as I'm a bow-tie maniac, but the numbers don't lie.