A car that can do less than 7 minutes on nurburgring with sport soft tires in stock condition, handles like a truck? LOL
Anyway, I'll post my times on Nurburgring and TGTT with americans, seems that my laps with the italians helped you in the other thread
NURBURGRING NORDSCHLEIFE
6:59.670 Dodge Viper SRT10 ACR '08
6:59.786 Ford GT '06
7:21.911 Dodge Viper GTS '02
7:28.508 Chevrolet Camaro SS '10
(I don't have a time with the Vette,I'll try it tomorrow 👍)
TOP GEAR TEST TRACK (standing start)
1:13.140 Dodge Viper SRT10 ACR '08
1:13.339 Ford GT '06
1:13.444 Chevrolet Corvette ZR1 (C6) '09
As you can see, the three cars are similar in terms of lap time, so I tell you my personal opinion on each car, to help you to choice.
Viper ACR : In my opinion is one of the best road car in the game, fast, EASY TO DRIVE (despite a lot of people thinks that it's like a truck

), obviously it has little wheelspin if you slam your feet on the pedal, but it has 612 HP, so you would expect exactly this from this car. In terms of lap times, it beat the other americans in all tracks I tried them.
Ford GT : Has the best handling compared to the Viper and the Corvette, but has some HP less than the Viper and the Corvette. It's certainly the most balanced car over the three, also because it's MR and not FR like the other two cars.
Corvette ZR1 : It's the most powerful, but the slowest on a track. To me it has the worse handling compared to the Viper and the GT, still is a great car. (i'm not saying is a crap of a car, is just worse than the other two).
Hope I helped!