2006 Nissan Altima 3.5 SL 4dr Sedan (3.5L 6cyl 5A)
I just bought one with 46k miles on it. I was happy to find that it still has plenty of power. I took it on a 7 hour road trip and enjoyed how easily I could pass other cars on the highway. It also gets pretty decent gas mileage for the size of the engine. The handling could be better, it feels heavy in turns. A little disappointed with the sound system. Overall a comfortable and capable vehicle.
Power, navigation system.
Turning radius isn't great. Sportier handling/suspension. Equalizer for the CD player. Lose the spoke in the center of the steering wheel. Seats are a little hard.