[kman10587]

'90-'97 Miata, without a doubt. It's lighter and gets better gas mileage than anything else on that list, parts are very cheap and abundant, and both the engine and suspension are highly responsive to tuning. It's the premier choice for a cheap, reliable autocross car. The main drawbacks are that storage space is next to nothing, and you have to deal with dumbasses who insist that it's a woman's car - other than that, you'd like it a lot, I bet.