BMW M2 - $54,500

Cars like the M3 and M5 are more powerful than the M2, but boy is this little coupe fun to drive. And while you might not see it on the spec sheet, the M2 is also a lot of car for your money. It offers the kind of balance and feedback that makes you want to drive it harder, and the harder you drive it, the more rewarding it is. While you can get other M cars for less than $100,000, the M2 is the one you're going to want if you're an enthusiast.