Hi, I currently own a 01 Z06 & am very pleased with it, I am contentplating getting a Viper. I understand that the 2003 & up Viper are much more refined in chassis, braking & performance. Are the coupes stiffer than the ragtops of this series? Are the 2008 models lazier on the bottom end than the 2003-2007 cars? Which Factory Rims are the lightest? Thanks, I'll probably have more questions in my search!