MR2 has amazing potential, to run great track times, and also to run bass ackwards into a tree. I'd say more potential to hit the tree.
Very fun cars, but they will give absolutely no warning when they're about to break loose.
If those were the three cars in question, I'd vote for the Supra. I don't really like the body lines, but the car's fairly reliable, with good potential for power. The turbo model pulls pretty nice.
What are your priorities? Reliability? Comfort? Performance? RWD? Also, what's your budget? Do you want an ultra-clean car, or are you willing to take a more beat-up car with more power?