I can not emphasize enough the importance of resisting the temptation to buy a new car. Unless you're going to lease, and get a car for $350 a month that would normally cost $600 to finance, I don't like the idea of buying a new car.
I guess I have a different perspective on this. If you are someone that plans of driving a car into the ground, I could not imagine any reason why you would want to take a chance on a used car, unless you cannot afford to buy a new car. You are at a huge disadvantage in buying a used car, because you do not know exactly what the previous owner(s) have or haven't done to the car. If you plan on keeping a car for 10+years, you're better off imho buying new than gambling on costly repairs down the line, unless you don't mind tinkering yourself.
If longevity is what you want, you probably should stick to an "appliance" type car (camry,corolla,accord,civic). No thrills perhaps, but definitely will allow you to do 200k miles probably without any major issues.
Unfortunately, nissans are NOT known for their reliability new or used. For that reason, I would not look any nissan product, except possibly the Skyline GT-R.
