There are a lot of hard to drive cars but few, that when mastered, are considered best in class. You can master a Banshee but its still in the bottom 3rd of its class.
The Dominator is probably best exception. It is the fastest but more challenging to drive than the Gauntlet. If you master the Dominator you can "dominate" the muscle classs
I have a dominator and I literally just mastered turning it without fishtailing.
Also, the 9F is definitely a good car. After racing my friend (I had an Elegy, he had a 9F), he beat me on the straights, and a couple of times on turns. He's also in Red Rum Racing and hasva positive record of over a couple thousand so he knows what he's doing.