My issues with Vettes are the interior being cheap...I just looked up the Z51 package, not bad.
The power is tempting but I would lean to the 40th, loving mine and its non stop compliments daily when I'm out. I think you might have more "daily" fun with the Z and you have a history of the Z
On the other hand...since u have a Z history, why not try something different...it might just make you really appreciate the Z and have you come running back