I know there are a bunch of Viper owners here. It is funny when I tell my Viper buddies I am getting a GT there is an almost universal "I am jealous" attitude even though Vipers including my 09 have surpassed GTs in terms of HP etc.
It seems almost all the Viper crowd would love to have a GT and could care less about stuff like ZR1s
I looked at ZR1s and drove them but my problem was with all the speed etc from 50 paces (10 with my eyesight) they look no different than a $40K Vette Coupe.
Then again I traded an 8 month old M5 on a new CTS-V and never looked back. Part of it was buying American but in truth the V is a better car at $30K less.
For the Record. The Stock GT was rated at 550 HP.. In reality they are in the 620 HP range. There is a post where Accufab put a stock boost GT motor on an engine dyno made 600 some HP..