Yeah, just like everybody else I started with a first gen Miata, red. I ran it pretty much stock and then I sold it after I won the Trueno, because the Miata was worth more, so I could fix the Trueno up better.
I used the Trueno to win a number of cars, one of which was a green first gen Miata. I sold nearly everything else including the Trueno to fix up the new Miata, which is currently pushing well over 300 hp. That's my main weapon for any race that doesn't require FWD or n/a engine.