I have a '16 Z51 M7. I daily it, mostly in the city. I have 16k miles on it.
My take on the levels of C7's available.
Stingray with Z51: 455HP. A ridiculous performance bargain. Get the coupe and you have LOTS of room in the back for luggage, dogs, whatever. Docile city car, cruses lazily at 80mph and gets 30mpg doing it. Want to pass something? Use 4th and enjoy the pull. Want to really pass? Use 3rd and scare both you and the car you are passing. If you have to have the A8, flush the torque converter 3 times. It's a chronic fail for the C7 and Chevy has never fixed it.
Grand Sport: 455HP but has the Z06 body, suspension & brakes.The best engine with the best suspension & brakes. If you like the "boy racer" body style, then it's the car to get. If you like less attention, the Stingray is the way to go.
Z06: 650HP. Too much power for anywhere. It's frustrating on the track and pointless on the street. For dick-waving only.
And yes, there is now the ZR1, but see Z06.
I've tracked the same car as mine at Ron Fellows racing. It was set on "race" setting but with some loose nannys. I had the best time throttle steering around the corners. Such an easy touch with so much tire and power!
Unless you are actually hampered by the amount of cargo space, the C7 is a "grand touring" auto in every sense. If you want me to help make sense of the option packages I'm happy to.
Just sayin', 2019 'vettes are glued to the ground now. If you might go for new, you've got the advantage. I know of a person that will negotiate a car purchase for you for a nominal fee. He's quite well known, but I'm still new at GRM and I don't want to do something dumb like advertising something or whatever!
Edit: Oh, forgot. Only been to the dealer for oil changes. Never a repair!