Indeed a Viper is. I've driven a couple of them on the track. It's a car that can be very rewarding or down right frightening. In the right hands, a stock ACR will break lap records, or kill a noob.
The Z is a good car to learn in. It's well balance, has enough power to get you in trouble, will reward you with a good lap. And it WILL suck you down the rabbit hole.
I've seen the Civic Si, EVO, STI have their moments going off the track. You can spin anything on the track if you try hard enough. Nothing like feeling when you spin 180. And you are looking eyeball to eyeball with the guy behind you. The look on both your faces. His eyes and your eyes are big as dinner plates.
Back in the pits. You ask the guy if he got it on video. He says no, he forgot to turn on his GoPro.
I said I got it. Only to find out that the battery died about 5 minutes before.
A good handling slow car will teach you more things than a fast car will. What you learn with the slow car will help you later in the fast car.
I road raced 1000cc motorcycles back in the late '70's and early '80's. Then started doing trackdays with motorcycles in early 2000. When I got my Z. I started doing trackdays with it. Had no trouble switching from 2 wheels to 4 wheels.