The coupe vs sedan is a tricky subject. The real answer is weight, and somewhat of a roll center issue. I have always like the sedan so I have made it a hobby to ask those that switch what they think. A lot of guys feel the sedan is a little more stable or has a lazier feel to it, I agree. The coupe does hold a better resale value due to demand. Given the fact of your location I would stick with a sealed engine, based on location and the level of competition on asphalt in N.C..
When buy an 5-8k car the bulk of the replacement value is in the motor (5k), so I would suggest finding a car with a somewhat fresh motor. Feel free to call me with any questions, doesn't matter to me if you buy from me, I will be happy to help you. There is information to be found on almost any car for sale.